31311232002320 has 40 divisors (see below), whose sum is σ = 72851868949824. Its totient is φ = 12515330728832.

The previous prime is 31311232002161. The next prime is 31311232002373. The reversal of 31311232002320 is 2320023211313.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143047334 + ... + 143266053.

Almost surely, 2^{31311232002320} is an apocalyptic number.

It is an amenable number.

31311232002320 is an abundant number, since it is smaller than the sum of its proper divisors (41540636947504).

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

31311232002320 is a wasteful number, since it uses less digits than its factorization.

31311232002320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286314767 (or 286314761 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 31311232002320 its reverse (2320023211313), we get a palindrome (33631255213633).

The spelling of 31311232002320 in words is "thirty-one trillion, three hundred eleven billion, two hundred thirty-two million, two thousand, three hundred twenty".