31042564 has 12 divisors (see below), whose sum is σ = 62085184. Its totient is φ = 13303944.

The previous prime is 31042541. The next prime is 31042567. The reversal of 31042564 is 46524013.

31042564 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (31042567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 554304 + ... + 554359.

Almost surely, 2^31042564 is an apocalyptic number.

It is an amenable number.

31042564 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

31042564 is a wasteful number, since it uses less digits than its factorization.

31042564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1108674 (or 1108672 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 31042564 is about 5571.5854117118. The cubic root of 31042564 is about 314.2817733862.

Adding to 31042564 its reverse (46524013), we get a palindrome (77566577).

The spelling of 31042564 in words is "thirty-one million, forty-two thousand, five hundred sixty-four".