225430920 has 384 divisors, whose sum is σ = 896313600. Its totient is φ = 48384000.

The previous prime is 225430903. The next prime is 225430921. The reversal of 225430920 is 29034522.

225430920 is a `hidden beast` number, since 225 + 430 + 9 + 2 + 0 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225430921) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1492845 + ... + 1492995.

It is an arithmetic number, because the mean of its divisors is an integer number (2334150).

Almost surely, 2^225430920 is an apocalyptic number.

225430920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 225430920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (448156800).

225430920 is an abundant number, since it is smaller than the sum of its proper divisors (670882680).

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

225430920 is a wasteful number, since it uses less digits than its factorization.

225430920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221 (or 214 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 225430920 is about 15014.3571290948. The cubic root of 225430920 is about 608.6082397132.

The spelling of 225430920 in words is "two hundred twenty-five million, four hundred thirty thousand, nine hundred twenty".