31668552 has 48 divisors (see below), whose sum is σ = 90817740. Its totient is φ = 9934848.

The previous prime is 31668547. The next prime is 31668557. The reversal of 31668552 is 25586613.

It is an interprime number because it is at equal distance from previous prime (31668547) and next prime (31668557).

It can be written as a sum of positive squares in 2 ways, for example, as 31069476 + 599076 = 5574^2 + 774^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31668557) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11713 + ... + 14160.

Almost surely, 2^31668552 is an apocalyptic number.

It is an amenable number.

31668552 is an abundant number, since it is smaller than the sum of its proper divisors (59149188).

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

31668552 is a wasteful number, since it uses less digits than its factorization.

31668552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25902 (or 25895 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 31668552 is about 5627.4818524807. The cubic root of 31668552 is about 316.3802771126.

The spelling of 31668552 in words is "thirty-one million, six hundred sixty-eight thousand, five hundred fifty-two".