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31052013460 = 22513119430821
BaseRepresentation
bin11100111010110110…
…000001111110010100
32222011001211201112121
4130322312001332110
51002043303412320
622133132225324
72146332521326
oct347266017624
988131751477
1031052013460
1112195063346
12602730b244
132c0b313c80
141708055616
15c1b1818aa
hex73ad81f94

31052013460 has 24 divisors (see below), whose sum is σ = 70225323336. Its totient is φ = 11465358720.

The previous prime is 31052013457. The next prime is 31052013463. The reversal of 31052013460 is 6431025013.

It is an interprime number because it is at equal distance from previous prime (31052013457) and next prime (31052013463).

It can be written as a sum of positive squares in 4 ways, for example, as 2038341904 + 29013671556 = 45148^2 + 170334^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31052013463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59715151 + ... + 59715670.

It is an arithmetic number, because the mean of its divisors is an integer number (2926055139).

Almost surely, 231052013460 is an apocalyptic number.

It is an amenable number.

31052013460 is an abundant number, since it is smaller than the sum of its proper divisors (39173309876).

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

31052013460 is a wasteful number, since it uses less digits than its factorization.

31052013460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119430843 (or 119430841 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

Adding to 31052013460 its reverse (6431025013), we get a palindrome (37483038473).

The spelling of 31052013460 in words is "thirty-one billion, fifty-two million, thirteen thousand, four hundred sixty".

Divisors: 1 2 4 5 10 13 20 26 52 65 130 260 119430821 238861642 477723284 597154105 1194308210 1552600673 2388616420 3105201346 6210402692 7763003365 15526006730 31052013460