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31043102240 = 2558316314341
BaseRepresentation
bin11100111010010100…
…000010011000100000
32222010110001222122102
4130322110002120200
51002034013232430
622132213225532
72146164005153
oct347224023040
988113058572
1031043102240
11121900271a7
1260243322a8
132c09513b67
141706bb5c9a
15c1a4c1345
hex73a502620

31043102240 has 96 divisors (see below), whose sum is σ = 74683498176. Its totient is φ = 12191523840.

The previous prime is 31043102213. The next prime is 31043102281. The reversal of 31043102240 is 4220134013.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2157470 + ... + 2171810.

It is an arithmetic number, because the mean of its divisors is an integer number (777953106).

Almost surely, 231043102240 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31043102240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37341749088).

31043102240 is an abundant number, since it is smaller than the sum of its proper divisors (43640395936).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31043102240 is a wasteful number, since it uses less digits than its factorization.

31043102240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14602 (or 14594 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 31043102240 its reverse (4220134013), we get a palindrome (35263236253).

The spelling of 31043102240 in words is "thirty-one billion, forty-three million, one hundred two thousand, two hundred forty".

Divisors: 1 2 4 5 8 10 16 20 32 40 80 83 160 163 166 326 332 415 652 664 815 830 1304 1328 1630 1660 2608 2656 3260 3320 5216 6520 6640 13040 13280 13529 14341 26080 27058 28682 54116 57364 67645 71705 108232 114728 135290 143410 216464 229456 270580 286820 432928 458912 541160 573640 1082320 1147280 1190303 2164640 2294560 2337583 2380606 4675166 4761212 5951515 9350332 9522424 11687915 11903030 18700664 19044848 23375830 23806060 37401328 38089696 46751660 47612120 74802656 93503320 95224240 187006640 190448480 194019389 374013280 388038778 776077556 970096945 1552155112 1940193890 3104310224 3880387780 6208620448 7760775560 15521551120 31043102240