215797264 has 20 divisors (see below), whose sum is σ = 418334956. Its totient is φ = 107839872.

The previous prime is 215797249. The next prime is 215797277. The reversal of 215797264 is 462797512.

It can be written as a sum of positive squares in 2 ways, for example, as 37307664 + 178489600 = 6108^2 + 13360^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 215797264.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55942 + ... + 59674.

Almost surely, 2^215797264 is an apocalyptic number.

It is an amenable number.

215797264 is a deficient number, since it is larger than the sum of its proper divisors (202537692).

215797264 is a wasteful number, since it uses less digits than its factorization.

215797264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7354 (or 7348 counting only the distinct ones).

The product of its digits is 211680, while the sum is 43.

The square root of 215797264 is about 14690.0396187349. The cubic root of 215797264 is about 599.8122227204.

The spelling of 215797264 in words is "two hundred fifteen million, seven hundred ninety-seven thousand, two hundred sixty-four".