31131200233 has 12 divisors (see below), whose sum is σ = 36291417552. Its totient is φ = 26626727400.

The previous prime is 31131200201. The next prime is 31131200251. The reversal of 31131200233 is 33200213113.

It is not a de Polignac number, because 31131200233 - 2⁵ = 31131200201 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 31131200233.

It is not an unprimeable number, because it can be changed into a prime (31131200293) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 657343 + ... + 703108.

It is an arithmetic number, because the mean of its divisors is an integer number (3024284796).

Almost surely, 2^31131200233 is an apocalyptic number.

It is an amenable number.

31131200233 is a deficient number, since it is larger than the sum of its proper divisors (5160217319).

31131200233 is a wasteful number, since it uses less digits than its factorization.

31131200233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1360932 (or 1360925 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 31131200233 its reverse (33200213113), we get a palindrome (64331413346).

The spelling of 31131200233 in words is "thirty-one billion, one hundred thirty-one million, two hundred thousand, two hundred thirty-three".