225530120 has 16 divisors (see below), whose sum is σ = 507442860. Its totient is φ = 90212032.

The previous prime is 225530117. The next prime is 225530147. The reversal of 225530120 is 21035522.

It can be written as a sum of positive squares in 2 ways, for example, as 221473924 + 4056196 = 14882^2 + 2014^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 225530092 and 225530101.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2819087 + ... + 2819166.

Almost surely, 2^225530120 is an apocalyptic number.

225530120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

225530120 is an abundant number, since it is smaller than the sum of its proper divisors (281912740).

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

225530120 is a wasteful number, since it uses less digits than its factorization.

225530120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5638264 (or 5638260 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 225530120 is about 15017.6602704949. The cubic root of 225530120 is about 608.6974985185.

Adding to 225530120 its reverse (21035522), we get a palindrome (246565642).

The spelling of 225530120 in words is "two hundred twenty-five million, five hundred thirty thousand, one hundred twenty".