225795990 has 64 divisors (see below), whose sum is σ = 632530944. Its totient is φ = 50510208.

The previous prime is 225795961. The next prime is 225796031. The reversal of 225795990 is 99597522.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1569 + ... + 21308.

It is an arithmetic number, because the mean of its divisors is an integer number (9883296).

Almost surely, 2^225795990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 225795990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (316265472).

225795990 is an abundant number, since it is smaller than the sum of its proper divisors (406734954).

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

225795990 is a wasteful number, since it uses less digits than its factorization.

225795990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22941.

The product of its (nonzero) digits is 510300, while the sum is 48.

The square root of 225795990 is about 15026.5095747482. The cubic root of 225795990 is about 608.9365957055.

The spelling of 225795990 in words is "two hundred twenty-five million, seven hundred ninety-five thousand, nine hundred ninety".