31325904 has 60 divisors (see below), whose sum is σ = 88169952. Its totient is φ = 10382400.

The previous prime is 31325881. The next prime is 31325911. The reversal of 31325904 is 40952313.

It is a super-2 number, since 2×31325904² = 1962624522834432, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29869 + ... + 30899.

Almost surely, 2^31325904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31325904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44084976).

31325904 is an abundant number, since it is smaller than the sum of its proper divisors (56844048).

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

31325904 is a wasteful number, since it uses less digits than its factorization.

31325904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1256 (or 1247 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 31325904 is about 5596.9548863645. The cubic root of 31325904 is about 315.2350777353.

The spelling of 31325904 in words is "thirty-one million, three hundred twenty-five thousand, nine hundred four".