31907223813 has 32 divisors (see below), whose sum is σ = 44319139200. Its totient is φ = 20394049536.

The previous prime is 31907223797. The next prime is 31907223833. The reversal of 31907223813 is 31832270913.

It is not a de Polignac number, because 31907223813 - 2⁴ = 31907223797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31907223833) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17954781 + ... + 17956557.

It is an arithmetic number, because the mean of its divisors is an integer number (1384973100).

Almost surely, 2^31907223813 is an apocalyptic number.

It is an amenable number.

31907223813 is a deficient number, since it is larger than the sum of its proper divisors (12411915387).

31907223813 is a wasteful number, since it uses less digits than its factorization.

31907223813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3141.

The product of its (nonzero) digits is 54432, while the sum is 39.

The spelling of 31907223813 in words is "thirty-one billion, nine hundred seven million, two hundred twenty-three thousand, eight hundred thirteen".