215044371400056 has 128 divisors (see below), whose sum is σ = 599132033372160. Its totient is φ = 63760478486400.

The previous prime is 215044371400039. The next prime is 215044371400099. The reversal of 215044371400056 is 650004173440512.

It is a junction number, because it is equal to n+sod(n) for n = 215044371399990 and 215044371400017.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41568111 + ... + 46454241.

It is an arithmetic number, because the mean of its divisors is an integer number (4680719010720).

Almost surely, 2^{215044371400056} 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 215044371400056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (299566016686080).

215044371400056 is an abundant number, since it is smaller than the sum of its proper divisors (384087661972104).

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

215044371400056 is a wasteful number, since it uses less digits than its factorization.

215044371400056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4889745 (or 4889741 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 42.

The spelling of 215044371400056 in words is "two hundred fifteen trillion, forty-four billion, three hundred seventy-one million, four hundred thousand, fifty-six".