225739224 has 56 divisors (see below), whose sum is σ = 634617660. Its totient is φ = 75244464.

The previous prime is 225739193. The next prime is 225739237. The reversal of 225739224 is 422937522.

It is a Harshad number since it is a multiple of its sum of digits (36).

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 13 ways as a sum of consecutive naturals, for example, 13522 + ... + 25185.

Almost surely, 2^225739224 is an apocalyptic number.

225739224 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

225739224 is an abundant number, since it is smaller than the sum of its proper divisors (408878436).

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

225739224 is an equidigital number, since it uses as much as digits as its factorization.

225739224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38731 (or 38712 counting only the distinct ones).

The product of its digits is 60480, while the sum is 36.

The square root of 225739224 is about 15024.6205942114. The cubic root of 225739224 is about 608.8855617434.

The spelling of 225739224 in words is "two hundred twenty-five million, seven hundred thirty-nine thousand, two hundred twenty-four".