31504942 has 24 divisors (see below), whose sum is σ = 55362960. Its totient is φ = 13406400.

The previous prime is 31504909. The next prime is 31504943. The reversal of 31504942 is 24940513.

It is a super-2 number, since 2×31504942² = 1985122740846728, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31504942.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31504943) 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, 13734 + ... + 15862.

It is an arithmetic number, because the mean of its divisors is an integer number (2306790).

Almost surely, 2^31504942 is an apocalyptic number.

31504942 is a deficient number, since it is larger than the sum of its proper divisors (23858018).

31504942 is a wasteful number, since it uses less digits than its factorization.

31504942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2296 (or 2289 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 31504942 is about 5612.9263312465. The cubic root of 31504942 is about 315.8344951298.

The spelling of 31504942 in words is "thirty-one million, five hundred four thousand, nine hundred forty-two".