31131233304 has 16 divisors (see below), whose sum is σ = 77828083320. Its totient is φ = 10377077760.

The previous prime is 31131233281. The next prime is 31131233347. The reversal of 31131233304 is 40333213113.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 1297134721 = 31131233304 / (3 + 1 + 1 + 3 + 1 + 2 + 3 + 3 + 3 + 0 + 4).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 648567337 + ... + 648567384.

Almost surely, 2^31131233304 is an apocalyptic number.

It is an amenable number.

31131233304 is an abundant number, since it is smaller than the sum of its proper divisors (46696850016).

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

31131233304 is a wasteful number, since it uses less digits than its factorization.

31131233304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1297134730 (or 1297134726 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 24.

Adding to 31131233304 its reverse (40333213113), we get a palindrome (71464446417).

The spelling of 31131233304 in words is "thirty-one billion, one hundred thirty-one million, two hundred thirty-three thousand, three hundred four".