31520170228 has 12 divisors (see below), whose sum is σ = 55370034720. Its totient is φ = 15700160312.

The previous prime is 31520170211. The next prime is 31520170243. The reversal of 31520170228 is 82207102513.

It is a super-2 number, since 2×31520170228² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31520170228.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14980018 + ... + 14982121.

It is an arithmetic number, because the mean of its divisors is an integer number (4614169560).

Almost surely, 2^31520170228 is an apocalyptic number.

It is an amenable number.

31520170228 is a deficient number, since it is larger than the sum of its proper divisors (23849864492).

31520170228 is a wasteful number, since it uses less digits than its factorization.

31520170228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29962406 (or 29962404 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 31.

The spelling of 31520170228 in words is "thirty-one billion, five hundred twenty million, one hundred seventy thousand, two hundred twenty-eight".