215566228735 has 96 divisors (see below), whose sum is σ = 315353751552. Its totient is φ = 140149002240.

The previous prime is 215566228727. The next prime is 215566228751. The reversal of 215566228735 is 537822665512.

It is not a de Polignac number, because 215566228735 - 2³ = 215566228727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 42373362 + ... + 42378448.

It is an arithmetic number, because the mean of its divisors is an integer number (3284934912).

Almost surely, 2^215566228735 is an apocalyptic number.

215566228735 is a deficient number, since it is larger than the sum of its proper divisors (99787522817).

215566228735 is a wasteful number, since it uses less digits than its factorization.

215566228735 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5273 (or 5260 counting only the distinct ones).

The product of its digits is 6048000, while the sum is 52.

The spelling of 215566228735 in words is "two hundred fifteen billion, five hundred sixty-six million, two hundred twenty-eight thousand, seven hundred thirty-five".