215464225 has 12 divisors (see below), whose sum is σ = 273693420. Its totient is φ = 168166400.

The previous prime is 215464217. The next prime is 215464243. The reversal of 215464225 is 522464512.

It can be written as a sum of positive squares in 6 ways, for example, as 35153041 + 180311184 = 5929^2 + 13428^2 .

It is not a de Polignac number, because 215464225 - 2³ = 215464217 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 104080 + ... + 106129.

It is an arithmetic number, because the mean of its divisors is an integer number (22807785).

Almost surely, 2^215464225 is an apocalyptic number.

215464225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

215464225 is a deficient number, since it is larger than the sum of its proper divisors (58229195).

215464225 is a wasteful number, since it uses less digits than its factorization.

215464225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210260 (or 210255 counting only the distinct ones).

The product of its digits is 19200, while the sum is 31.

The square root of 215464225 is about 14678.6997039929. The cubic root of 215464225 is about 599.5035012988.

The spelling of 215464225 in words is "two hundred fifteen million, four hundred sixty-four thousand, two hundred twenty-five".