31353972 has 24 divisors (see below), whose sum is σ = 78787296. Its totient is φ = 9647328.

The previous prime is 31353953. The next prime is 31353977. The reversal of 31353972 is 27935313.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31353977) 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, 100338 + ... + 100649.

It is an arithmetic number, because the mean of its divisors is an integer number (3282804).

Almost surely, 2^31353972 is an apocalyptic number.

It is an amenable number.

31353972 is an abundant number, since it is smaller than the sum of its proper divisors (47433324).

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

31353972 is a wasteful number, since it uses less digits than its factorization.

31353972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201007 (or 201005 counting only the distinct ones).

The product of its digits is 17010, while the sum is 33.

The square root of 31353972 is about 5599.4617598480. The cubic root of 31353972 is about 315.3291998062.

It can be divided in two parts, 313 and 53972, that added together give a triangular number (54285 = T₃₂₉).

The spelling of 31353972 in words is "thirty-one million, three hundred fifty-three thousand, nine hundred seventy-two".