31004534 has 16 divisors (see below), whose sum is σ = 51212736. Its totient is φ = 13960200.

The previous prime is 31004513. The next prime is 31004543. The reversal of 31004534 is 43540013.

It is a super-2 number, since 2×31004534² = 1922562257114312, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4232 + ... + 8939.

It is an arithmetic number, because the mean of its divisors is an integer number (3200796).

Almost surely, 2^31004534 is an apocalyptic number.

31004534 is a deficient number, since it is larger than the sum of its proper divisors (20208202).

31004534 is a wasteful number, since it uses less digits than its factorization.

31004534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13291.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 31004534 is about 5568.1715131630. The cubic root of 31004534 is about 314.1533795677.

Adding to 31004534 its reverse (43540013), we get a palindrome (74544547).

The spelling of 31004534 in words is "thirty-one million, four thousand, five hundred thirty-four".