31023012 has 12 divisors (see below), whose sum is σ = 72387056. Its totient is φ = 10341000.

The previous prime is 31023007. The next prime is 31023023. The reversal of 31023012 is 21032013.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Harshad number since it is a multiple of its sum of digits (12), and also a Moran number because the ratio is a prime number: 2585251 = 31023012 / (3 + 1 + 0 + 2 + 3 + 0 + 1 + 2).

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, 1292614 + ... + 1292637.

Almost surely, 2^31023012 is an apocalyptic number.

It is an amenable number.

31023012 is an abundant number, since it is smaller than the sum of its proper divisors (41364044).

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

31023012 is a wasteful number, since it uses less digits than its factorization.

31023012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2585258 (or 2585256 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 31023012 is about 5569.8305180679. The cubic root of 31023012 is about 314.2157766064.

Adding to 31023012 its reverse (21032013), we get a palindrome (52055025).

Subtracting from 31023012 its reverse (21032013), we obtain a palindrome (9990999).

The spelling of 31023012 in words is "thirty-one million, twenty-three thousand, twelve".