31261603015272 has 32 divisors (see below), whose sum is σ = 89318865758400. Its totient is φ = 8931886575744.

The previous prime is 31261603015271. The next prime is 31261603015283. The reversal of 31261603015272 is 27251030616213.

It is a self number, because there is not a number n which added to its sum of digits gives 31261603015272.

It is not an unprimeable number, because it can be changed into a prime (31261603015271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93040484997 + ... + 93040485332.

It is an arithmetic number, because the mean of its divisors is an integer number (2791214554950).

Almost surely, 2^{31261603015272} is an apocalyptic number.

It is an amenable number.

31261603015272 is an abundant number, since it is smaller than the sum of its proper divisors (58057262743128).

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

31261603015272 is a wasteful number, since it uses less digits than its factorization.

31261603015272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186080970345 (or 186080970341 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 39.

The spelling of 31261603015272 in words is "thirty-one trillion, two hundred sixty-one billion, six hundred three million, fifteen thousand, two hundred seventy-two".