31013012223 has 12 divisors (see below), whose sum is σ = 44798177320. Its totient is φ = 20674601136.

The previous prime is 31013012201. The next prime is 31013012243. The reversal of 31013012223 is 32221031013.

31013012223 is a `hidden beast` number, since 310 + 130 + 1 + 2 + 223 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-31013012223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31013012196 and 31013012205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31013012243) 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, 344040 + ... + 424722.

Almost surely, 2^31013012223 is an apocalyptic number.

31013012223 is a deficient number, since it is larger than the sum of its proper divisors (13785165097).

31013012223 is a wasteful number, since it uses less digits than its factorization.

31013012223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123398 (or 123395 counting only the distinct ones).

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

Adding to 31013012223 its reverse (32221031013), we get a palindrome (63234043236).

The spelling of 31013012223 in words is "thirty-one billion, thirteen million, twelve thousand, two hundred twenty-three".