215371525968 has 320 divisors, whose sum is σ = 674919302400. Its totient is φ = 66344832000.

The previous prime is 215371525951. The next prime is 215371526023. The reversal of 215371525968 is 869525173512.

215371525968 is a `hidden beast` number, since 2 + 1 + 5 + 37 + 15 + 2 + 596 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 27254818 + ... + 27262718.

It is an arithmetic number, because the mean of its divisors is an integer number (2109122820).

Almost surely, 2^215371525968 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 215371525968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (337459651200).

215371525968 is an abundant number, since it is smaller than the sum of its proper divisors (459547776432).

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

215371525968 is an equidigital number, since it uses as much as digits as its factorization.

215371525968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7990 (or 7966 counting only the distinct ones).

The product of its digits is 4536000, while the sum is 54.

The spelling of 215371525968 in words is "two hundred fifteen billion, three hundred seventy-one million, five hundred twenty-five thousand, nine hundred sixty-eight".