215715072 has 36 divisors (see below), whose sum is σ = 574118720. Its totient is φ = 71904768.

The previous prime is 215715041. The next prime is 215715121. The reversal of 215715072 is 270517512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139672 + ... + 141207.

Almost surely, 2^215715072 is an apocalyptic number.

It is an amenable number.

215715072 is an abundant number, since it is smaller than the sum of its proper divisors (358403648).

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

215715072 is an equidigital number, since it uses as much as digits as its factorization.

215715072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280898 (or 280884 counting only the distinct ones).

The product of its (nonzero) digits is 4900, while the sum is 30.

The square root of 215715072 is about 14687.2418104966. The cubic root of 215715072 is about 599.7360616891.

The spelling of 215715072 in words is "two hundred fifteen million, seven hundred fifteen thousand, seventy-two".