31523406631 has 16 divisors (see below), whose sum is σ = 33803827200. Its totient is φ = 29319811488.

The previous prime is 31523406617. The next prime is 31523406641. The reversal of 31523406631 is 13660432513.

It is a cyclic number.

It is not a de Polignac number, because 31523406631 - 2¹⁵ = 31523373863 is a prime.

It is a super-2 number, since 2×31523406631² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31523406641) 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, 1486380 + ... + 1507438.

It is an arithmetic number, because the mean of its divisors is an integer number (2112739200).

Almost surely, 2^31523406631 is an apocalyptic number.

31523406631 is a deficient number, since it is larger than the sum of its proper divisors (2280420569).

31523406631 is a wasteful number, since it uses less digits than its factorization.

31523406631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22878.

The product of its (nonzero) digits is 38880, while the sum is 34.

The spelling of 31523406631 in words is "thirty-one billion, five hundred twenty-three million, four hundred six thousand, six hundred thirty-one".