31373272 has 16 divisors (see below), whose sum is σ = 67228560. Its totient is φ = 13445664.

The previous prime is 31373269. The next prime is 31373281. The reversal of 31373272 is 27237313.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 31373272.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 280063 + ... + 280174.

It is an arithmetic number, because the mean of its divisors is an integer number (4201785).

Almost surely, 2^31373272 is an apocalyptic number.

It is an amenable number.

31373272 is an abundant number, since it is smaller than the sum of its proper divisors (35855288).

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

31373272 is a wasteful number, since it uses less digits than its factorization.

31373272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560250 (or 560246 counting only the distinct ones).

The product of its digits is 5292, while the sum is 28.

The square root of 31373272 is about 5601.1848746493. The cubic root of 31373272 is about 315.3938870411.

The spelling of 31373272 in words is "thirty-one million, three hundred seventy-three thousand, two hundred seventy-two".