31525052513 has 16 divisors (see below), whose sum is σ = 32297256576. Its totient is φ = 30764897280.

The previous prime is 31525052473. The next prime is 31525052579.

31525052513 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 31525052513 - 2⁸ = 31525052257 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31525052513.

It is not an unprimeable number, because it can be changed into a prime (31525052413) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2119643 + ... + 2134463.

It is an arithmetic number, because the mean of its divisors is an integer number (2018578536).

Almost surely, 2^31525052513 is an apocalyptic number.

It is an amenable number.

31525052513 is a deficient number, since it is larger than the sum of its proper divisors (772204063).

31525052513 is a wasteful number, since it uses less digits than its factorization.

31525052513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15224.

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

It can be divided in two parts, 315250 and 52513, that added together give a palindrome (367763).

The spelling of 31525052513 in words is "thirty-one billion, five hundred twenty-five million, fifty-two thousand, five hundred thirteen".