215512005056 has 112 divisors (see below), whose sum is σ = 463289904000. Its totient is φ = 99097509888.

The previous prime is 215512005043. The next prime is 215512005077. The reversal of 215512005056 is 650500215512.

It is a Harshad number since it is a multiple of its sum of digits (32).

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, 8324420 + ... + 8350268.

It is an arithmetic number, because the mean of its divisors is an integer number (4136517000).

Almost surely, 2^215512005056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215512005056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (231644952000).

215512005056 is an abundant number, since it is smaller than the sum of its proper divisors (247777898944).

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

215512005056 is a wasteful number, since it uses less digits than its factorization.

215512005056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26054 (or 26044 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 32.

The spelling of 215512005056 in words is "two hundred fifteen billion, five hundred twelve million, five thousand, fifty-six".