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31100043400 = 23522320993221
BaseRepresentation
bin11100111101101101…
…010000000010001000
32222021102012220020021
4130331231100002020
51002143102342100
622142005510224
72150455002316
oct347555200210
988242186207
1031100043400
111220a188a08
12603b412374
132c1825c75a
1417105990b6
15c204bca1a
hex73db50088

31100043400 has 96 divisors (see below), whose sum is σ = 75510792000. Its totient is φ = 11889785600.

The previous prime is 31100043349. The next prime is 31100043409. The reversal of 31100043400 is 434000113.

It is not an unprimeable number, because it can be changed into a prime (31100043409) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9653790 + ... + 9657010.

It is an arithmetic number, because the mean of its divisors is an integer number (786570750).

Almost surely, 231100043400 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 31100043400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37755396000).

31100043400 is an abundant number, since it is smaller than the sum of its proper divisors (44410748600).

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

31100043400 is a wasteful number, since it uses less digits than its factorization.

31100043400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5359 (or 5350 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 31100043400 its reverse (434000113), we get a palindrome (31534043513).

The spelling of 31100043400 in words is "thirty-one billion, one hundred million, forty-three thousand, four hundred".

Divisors: 1 2 4 5 8 10 20 23 25 40 46 50 92 100 115 184 200 230 460 575 920 1150 2099 2300 3221 4198 4600 6442 8396 10495 12884 16105 16792 20990 25768 32210 41980 48277 52475 64420 74083 80525 83960 96554 104950 128840 148166 161050 193108 209900 241385 296332 322100 370415 386216 419800 482770 592664 644200 740830 965540 1206925 1481660 1852075 1931080 2413850 2963320 3704150 4827700 6760879 7408300 9655400 13521758 14816600 27043516 33804395 54087032 67608790 135217580 155500217 169021975 270435160 311000434 338043950 622000868 676087900 777501085 1244001736 1352175800 1555002170 3110004340 3887505425 6220008680 7775010850 15550021700 31100043400