31972772 has 18 divisors (see below), whose sum is σ = 60588738. Its totient is φ = 14756352.

The previous prime is 31972753. The next prime is 31972807. The reversal of 31972772 is 27727913.

It can be written as a sum of positive squares in 3 ways, for example, as 343396 + 31629376 = 586^2 + 5624^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22973 + ... + 24324.

It is an arithmetic number, because the mean of its divisors is an integer number (3366041).

Almost surely, 2^31972772 is an apocalyptic number.

It is an amenable number.

31972772 is a deficient number, since it is larger than the sum of its proper divisors (28615966).

31972772 is a wasteful number, since it uses less digits than its factorization.

31972772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47327 (or 47312 counting only the distinct ones).

The product of its digits is 37044, while the sum is 38.

The square root of 31972772 is about 5654.4470994077. The cubic root of 31972772 is about 317.3901395178.

The spelling of 31972772 in words is "thirty-one million, nine hundred seventy-two thousand, seven hundred seventy-two".