215111650556 has 18 divisors (see below), whose sum is σ = 413778816360. Its totient is φ = 97778022760.

The previous prime is 215111650549. The next prime is 215111650577. The reversal of 215111650556 is 655056111512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 222222296 + ... + 222223263.

It is an arithmetic number, because the mean of its divisors is an integer number (22987712020).

Almost surely, 2^215111650556 is an apocalyptic number.

It is an amenable number.

215111650556 is a deficient number, since it is larger than the sum of its proper divisors (198667165804).

215111650556 is a wasteful number, since it uses less digits than its factorization.

215111650556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444445585 (or 444445572 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 38.

The spelling of 215111650556 in words is "two hundred fifteen billion, one hundred eleven million, six hundred fifty thousand, five hundred fifty-six".