31013012 has 12 divisors (see below), whose sum is σ = 54511380. Its totient is φ = 15438336.

The previous prime is 31012973. The next prime is 31013023. The reversal of 31013012 is 21031013.

It can be written as a sum of positive squares in 2 ways, for example, as 30426256 + 586756 = 5516^2 + 766^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31012984 and 31013002.

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, 16013 + ... + 17844.

It is an arithmetic number, because the mean of its divisors is an integer number (4542615).

Almost surely, 2^31013012 is an apocalyptic number.

It is an amenable number.

31013012 is a deficient number, since it is larger than the sum of its proper divisors (23498368).

31013012 is a wasteful number, since it uses less digits than its factorization.

31013012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34090 (or 34088 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 31013012 is about 5568.9327523324. The cubic root of 31013012 is about 314.1820113975.

Adding to 31013012 its reverse (21031013), we get a palindrome (52044025).

The spelling of 31013012 in words is "thirty-one million, thirteen thousand, twelve".