215225972 has 48 divisors (see below), whose sum is σ = 419634432. Its totient is φ = 95959680.

The previous prime is 215225947. The next prime is 215225987. The reversal of 215225972 is 279522512.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 202322 + ... + 203382.

It is an arithmetic number, because the mean of its divisors is an integer number (8742384).

Almost surely, 2^215225972 is an apocalyptic number.

It is an amenable number.

215225972 is a deficient number, since it is larger than the sum of its proper divisors (204408460).

215225972 is a wasteful number, since it uses less digits than its factorization.

215225972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1208 (or 1206 counting only the distinct ones).

The product of its digits is 25200, while the sum is 35.

The square root of 215225972 is about 14670.5818562182. The cubic root of 215225972 is about 599.2824496186.

The spelling of 215225972 in words is "two hundred fifteen million, two hundred twenty-five thousand, nine hundred seventy-two".