215733281280 has 480 divisors, whose sum is σ = 767477253312. Its totient is φ = 51650396160.

The previous prime is 215733281273. The next prime is 215733281297. The reversal of 215733281280 is 82182337512.

It is a tau number, because it is divible by the number of its divisors (480).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 77128842 + ... + 77131638.

Almost surely, 2^215733281280 is an apocalyptic number.

215733281280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215733281280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (383738626656).

215733281280 is an abundant number, since it is smaller than the sum of its proper divisors (551743972032).

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

215733281280 is a wasteful number, since it uses less digits than its factorization.

215733281280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2928 (or 2901 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 42.

The spelling of 215733281280 in words is "two hundred fifteen billion, seven hundred thirty-three million, two hundred eighty-one thousand, two hundred eighty".