225537631 has 16 divisors (see below), whose sum is σ = 256048128. Its totient is φ = 196861600.

The previous prime is 225537601. The next prime is 225537667. The reversal of 225537631 is 136735522.

It is a cyclic number.

It is not a de Polignac number, because 225537631 - 2⁹ = 225537119 is a prime.

It is a super-2 number, since 2×225537631² = 101734445994184322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225537601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23286 + ... + 31516.

It is an arithmetic number, because the mean of its divisors is an integer number (16003008).

Almost surely, 2^225537631 is an apocalyptic number.

225537631 is a deficient number, since it is larger than the sum of its proper divisors (30510497).

225537631 is a wasteful number, since it uses less digits than its factorization.

225537631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8342.

The product of its digits is 37800, while the sum is 34.

The square root of 225537631 is about 15017.9103406566. The cubic root of 225537631 is about 608.7042557477.

The spelling of 225537631 in words is "two hundred twenty-five million, five hundred thirty-seven thousand, six hundred thirty-one".