225138860 has 24 divisors (see below), whose sum is σ = 475699056. Its totient is φ = 89501760.

The previous prime is 225138857. The next prime is 225138877. The reversal of 225138860 is 68831522.

It is a self number, because there is not a number n which added to its sum of digits gives 225138860.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31271 + ... + 37790.

It is an arithmetic number, because the mean of its divisors is an integer number (19820794).

Almost surely, 2^225138860 is an apocalyptic number.

225138860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

225138860 is an abundant number, since it is smaller than the sum of its proper divisors (250560196).

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

225138860 is a wasteful number, since it uses less digits than its factorization.

225138860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69233 (or 69231 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 225138860 is about 15004.6279527351. The cubic root of 225138860 is about 608.3452959846.

The spelling of 225138860 in words is "two hundred twenty-five million, one hundred thirty-eight thousand, eight hundred sixty".