31613952 has 88 divisors (see below), whose sum is σ = 86661792. Its totient is φ = 10240000.

The previous prime is 31613927. The next prime is 31613963. The reversal of 31613952 is 25931613.

It is a super-2 number, since 2×31613952² = 1998883922116608, which contains 22 as substring.

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, 125827 + ... + 126077.

Almost surely, 2^31613952 is an apocalyptic number.

31613952 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31613952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43330896).

31613952 is an abundant number, since it is smaller than the sum of its proper divisors (55047840).

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

31613952 is a wasteful number, since it uses less digits than its factorization.

31613952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315 (or 297 counting only the distinct ones).

The product of its digits is 4860, while the sum is 30.

The square root of 31613952 is about 5622.6285667826. The cubic root of 31613952 is about 316.1983479413.

The spelling of 31613952 in words is "thirty-one million, six hundred thirteen thousand, nine hundred fifty-two".