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31055532125 = 539711172293
BaseRepresentation
bin11100111011000011…
…011101000001011101
32222011022110111020112
4130323003131001131
51002100204012000
622133335455405
72146404444662
oct347303350135
988138414215
1031055532125
1112197046a32
126028527565
132c0bc76717
1417086cda69
15c1b629235
hex73b0dd05d

31055532125 has 32 divisors (see below), whose sum is σ = 39209011296. Its totient is φ = 24555571200.

The previous prime is 31055532103. The next prime is 31055532199. The reversal of 31055532125 is 52123555013.

It can be written as a sum of positive squares in 16 ways, for example, as 30343549636 + 711982489 = 174194^2 + 26683^2 .

It is not a de Polignac number, because 31055532125 - 214 = 31055515741 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 31055532091 and 31055532100.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 13542479 + ... + 13544771.

It is an arithmetic number, because the mean of its divisors is an integer number (1225281603).

Almost surely, 231055532125 is an apocalyptic number.

It is an amenable number.

31055532125 is a deficient number, since it is larger than the sum of its proper divisors (8153479171).

31055532125 is a wasteful number, since it uses less digits than its factorization.

31055532125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3522 (or 3512 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 32.

The spelling of 31055532125 in words is "thirty-one billion, fifty-five million, five hundred thirty-two thousand, one hundred twenty-five".

Divisors: 1 5 25 97 125 485 1117 2293 2425 5585 11465 12125 27925 57325 108349 139625 222421 286625 541745 1112105 2561281 2708725 5560525 12806405 13543625 27802625 64032025 248444257 320160125 1242221285 6211106425 31055532125