225931860 has 144 divisors (see below), whose sum is σ = 854485632. Its totient is φ = 46944000.

The previous prime is 225931843. The next prime is 225931873. The reversal of 225931860 is 68139522.

225931860 is a `hidden beast` number, since 2 + 2 + 593 + 1 + 8 + 60 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5710 + ... + 22010.

It is an arithmetic number, because the mean of its divisors is an integer number (5933928).

Almost surely, 2^225931860 is an apocalyptic number.

225931860 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 225931860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (427242816).

225931860 is an abundant number, since it is smaller than the sum of its proper divisors (628553772).

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

225931860 is a wasteful number, since it uses less digits than its factorization.

225931860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16334 (or 16329 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 225931860 is about 15031.0299048335. The cubic root of 225931860 is about 609.0587112866.

The spelling of 225931860 in words is "two hundred twenty-five million, nine hundred thirty-one thousand, eight hundred sixty".