225731856 has 120 divisors (see below), whose sum is σ = 703746624. Its totient is φ = 61067520.

The previous prime is 225731833. The next prime is 225731861. The reversal of 225731856 is 658137522.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 120366 + ... + 122226.

Almost surely, 2^225731856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 225731856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (351873312).

225731856 is an abundant number, since it is smaller than the sum of its proper divisors (478014768).

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

225731856 is a wasteful number, since it uses less digits than its factorization.

225731856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1917 (or 1892 counting only the distinct ones).

The product of its digits is 100800, while the sum is 39.

The square root of 225731856 is about 15024.3753946712. The cubic root of 225731856 is about 608.8789371118.

The spelling of 225731856 in words is "two hundred twenty-five million, seven hundred thirty-one thousand, eight hundred fifty-six".