31004313012 has 36 divisors (see below), whose sum is σ = 82496858080. Its totient is φ = 9790835472.

The previous prime is 31004312959. The next prime is 31004313013. The reversal of 31004313012 is 21031340013.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×31004313012² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31004313013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22663288 + ... + 22664655.

Almost surely, 2^31004313012 is an apocalyptic number.

It is an amenable number.

31004313012 is an abundant number, since it is smaller than the sum of its proper divisors (51492545068).

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

31004313012 is a wasteful number, since it uses less digits than its factorization.

31004313012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45327972 (or 45327967 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 31004313012 its reverse (21031340013), we get a palindrome (52035653025).

The spelling of 31004313012 in words is "thirty-one billion, four million, three hundred thirteen thousand, twelve".