31661952 has 64 divisors (see below), whose sum is σ = 96124800. Its totient is φ = 9045504.

The previous prime is 31661909. The next prime is 31661957. The reversal of 31661952 is 25916613.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31661957) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3202 + ... + 8577.

It is an arithmetic number, because the mean of its divisors is an integer number (1501950).

Almost surely, 2^31661952 is an apocalyptic number.

31661952 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

31661952 is an abundant number, since it is smaller than the sum of its proper divisors (64462848).

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

31661952 is a wasteful number, since it uses less digits than its factorization.

31661952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11803 (or 11791 counting only the distinct ones).

The product of its digits is 9720, while the sum is 33.

The square root of 31661952 is about 5626.8954139916. The cubic root of 31661952 is about 316.3582967907.

The spelling of 31661952 in words is "thirty-one million, six hundred sixty-one thousand, nine hundred fifty-two".