56215531217170 has 16 divisors (see below), whose sum is σ = 108971645128920. Its totient is φ = 20756503833984.

The previous prime is 56215531217143. The next prime is 56215531217249. The reversal of 56215531217170 is 7171213551265.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 26105651578161 + 30109879639009 = 5109369^2 + 5487247^2 .

It is a super-2 number, since 2×56215531217170² (a number of 28 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 56215531217170.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 216213581475 + ... + 216213581734.

Almost surely, 2^{56215531217170} is an apocalyptic number.

56215531217170 is a deficient number, since it is larger than the sum of its proper divisors (52756113911750).

56215531217170 is a wasteful number, since it uses less digits than its factorization.

56215531217170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432427163229.

The product of its (nonzero) digits is 441000, while the sum is 46.

The spelling of 56215531217170 in words is "fifty-six trillion, two hundred fifteen billion, five hundred thirty-one million, two hundred seventeen thousand, one hundred seventy".