225633591 has 12 divisors (see below), whose sum is σ = 329842968. Its totient is φ = 148609584.

The previous prime is 225633587. The next prime is 225633613. The reversal of 225633591 is 195336522.

225633591 is a `hidden beast` number, since 2 + 2 + 5 + 63 + 3 + 591 = 666.

It is not a de Polignac number, because 225633591 - 2² = 225633587 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225633521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 150280 + ... + 151773.

It is an arithmetic number, because the mean of its divisors is an integer number (27486914).

Almost surely, 2^225633591 is an apocalyptic number.

225633591 is a deficient number, since it is larger than the sum of its proper divisors (104209377).

225633591 is a wasteful number, since it uses less digits than its factorization.

225633591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302142 (or 302139 counting only the distinct ones).

The product of its digits is 48600, while the sum is 36.

The square root of 225633591 is about 15021.1048528396. The cubic root of 225633591 is about 608.7905724272.

The spelling of 225633591 in words is "two hundred twenty-five million, six hundred thirty-three thousand, five hundred ninety-one".