31930224 has 20 divisors (see below), whose sum is σ = 82486536. Its totient is φ = 10643392.

The previous prime is 31930219. The next prime is 31930229. The reversal of 31930224 is 42203913.

It is an interprime number because it is at equal distance from previous prime (31930219) and next prime (31930229).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 31930194 and 31930203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31930229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 332559 + ... + 332654.

Almost surely, 2^31930224 is an apocalyptic number.

It is an amenable number.

31930224 is an abundant number, since it is smaller than the sum of its proper divisors (50556312).

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

31930224 is a wasteful number, since it uses less digits than its factorization.

31930224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665224 (or 665218 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 31930224 is about 5650.6834984805. The cubic root of 31930224 is about 317.2492872700.

The spelling of 31930224 in words is "thirty-one million, nine hundred thirty thousand, two hundred twenty-four".