215225232 has 20 divisors (see below), whose sum is σ = 555998640. Its totient is φ = 71741728.

The previous prime is 215225183. The next prime is 215225251. The reversal of 215225232 is 232522512.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2241882 + ... + 2241977.

It is an arithmetic number, because the mean of its divisors is an integer number (27799932).

Almost surely, 2^215225232 is an apocalyptic number.

It is an amenable number.

215225232 is an abundant number, since it is smaller than the sum of its proper divisors (340773408).

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

215225232 is a wasteful number, since it uses less digits than its factorization.

215225232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4483870 (or 4483864 counting only the distinct ones).

The product of its digits is 2400, while the sum is 24.

The square root of 215225232 is about 14670.5566356563. The cubic root of 215225232 is about 599.2817627908.

Adding to 215225232 its reverse (232522512), we get a palindrome (447747744).

The spelling of 215225232 in words is "two hundred fifteen million, two hundred twenty-five thousand, two hundred thirty-two".