225504120 has 64 divisors (see below), whose sum is σ = 690923520. Its totient is φ = 58853504.

The previous prime is 225504109. The next prime is 225504131. The reversal of 225504120 is 21405522.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (225504109) and next prime (225504131).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14352 + ... + 25631.

It is an arithmetic number, because the mean of its divisors is an integer number (10795680).

Almost surely, 2^225504120 is an apocalyptic number.

225504120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

225504120 is an abundant number, since it is smaller than the sum of its proper divisors (465419400).

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

225504120 is a wasteful number, since it uses less digits than its factorization.

225504120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40044 (or 40040 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 225504120 is about 15016.7945980492. The cubic root of 225504120 is about 608.6741066050.

Adding to 225504120 its reverse (21405522), we get a palindrome (246909642).

The spelling of 225504120 in words is "two hundred twenty-five million, five hundred four thousand, one hundred twenty".