31265228 has 12 divisors (see below), whose sum is σ = 54999000. Its totient is φ = 15551232.

The previous prime is 31265209. The next prime is 31265231. The reversal of 31265228 is 82256213.

It is a self number, because there is not a number n which added to its sum of digits gives 31265228.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19478 + ... + 21021.

It is an arithmetic number, because the mean of its divisors is an integer number (4583250).

Almost surely, 2^31265228 is an apocalyptic number.

It is an amenable number.

31265228 is a deficient number, since it is larger than the sum of its proper divisors (23733772).

31265228 is a wasteful number, since it uses less digits than its factorization.

31265228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40696 (or 40694 counting only the distinct ones).

The product of its digits is 5760, while the sum is 29.

The square root of 31265228 is about 5591.5318115879. The cubic root of 31265228 is about 315.0314170395.

The spelling of 31265228 in words is "thirty-one million, two hundred sixty-five thousand, two hundred twenty-eight".