225404520 has 64 divisors (see below), whose sum is σ = 737691840. Its totient is φ = 54643200.

The previous prime is 225404489. The next prime is 225404551. The reversal of 225404520 is 25404522.

It is a happy number.

225404520 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (225404489) and next prime (225404551).

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

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, 84061 + ... + 86700.

It is an arithmetic number, because the mean of its divisors is an integer number (11526435).

Almost surely, 2^225404520 is an apocalyptic number.

225404520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

225404520 is an abundant number, since it is smaller than the sum of its proper divisors (512287320).

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

225404520 is a wasteful number, since it uses less digits than its factorization.

225404520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170786 (or 170782 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 24.

The square root of 225404520 is about 15013.4779448334. The cubic root of 225404520 is about 608.5844809423.

The spelling of 225404520 in words is "two hundred twenty-five million, four hundred four thousand, five hundred twenty".