215797272 has 16 divisors (see below), whose sum is σ = 539493240. Its totient is φ = 71932416.

The previous prime is 215797249. The next prime is 215797277. The reversal of 215797272 is 272797512.

215797272 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215797277) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4495753 + ... + 4495800.

Almost surely, 2^215797272 is an apocalyptic number.

It is an amenable number.

215797272 is an abundant number, since it is smaller than the sum of its proper divisors (323695968).

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

215797272 is a wasteful number, since it uses less digits than its factorization.

215797272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8991562 (or 8991558 counting only the distinct ones).

The product of its digits is 123480, while the sum is 42.

The square root of 215797272 is about 14690.0398910282. The cubic root of 215797272 is about 599.8122301325.

The spelling of 215797272 in words is "two hundred fifteen million, seven hundred ninety-seven thousand, two hundred seventy-two".