215656215006 has 32 divisors (see below), whose sum is σ = 432714447360. Its totient is φ = 71652075264.

The previous prime is 215656214989. The next prime is 215656215011. The reversal of 215656215006 is 600512656512.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2538981 + ... + 2622543.

It is an arithmetic number, because the mean of its divisors is an integer number (13522326480).

Almost surely, 2^215656215006 is an apocalyptic number.

215656215006 is an abundant number, since it is smaller than the sum of its proper divisors (217058232354).

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

215656215006 is a wasteful number, since it uses less digits than its factorization.

215656215006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84960.

The product of its (nonzero) digits is 108000, while the sum is 39.

The spelling of 215656215006 in words is "two hundred fifteen billion, six hundred fifty-six million, two hundred fifteen thousand, six".