215797265 has 16 divisors (see below), whose sum is σ = 268401600. Its totient is φ = 166364352.

The previous prime is 215797249. The next prime is 215797277. The reversal of 215797265 is 562797512.

215797265 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 215797265 - 2⁴ = 215797249 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97946 + ... + 100124.

It is an arithmetic number, because the mean of its divisors is an integer number (16775100).

Almost surely, 2^215797265 is an apocalyptic number.

It is an amenable number.

215797265 is a deficient number, since it is larger than the sum of its proper divisors (52604335).

215797265 is a wasteful number, since it uses less digits than its factorization.

215797265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2896.

The product of its digits is 264600, while the sum is 44.

The square root of 215797265 is about 14690.0396527715. The cubic root of 215797265 is about 599.8122236469.

The spelling of 215797265 in words is "two hundred fifteen million, seven hundred ninety-seven thousand, two hundred sixty-five".