225590445 has 18 divisors (see below), whose sum is σ = 391198158. Its totient is φ = 120261168.

The previous prime is 225590429. The next prime is 225590461. The reversal of 225590445 is 544095522.

225590445 is a `hidden beast` number, since 2 + 25 + 590 + 4 + 45 = 666.

It is an interprime number because it is at equal distance from previous prime (225590429) and next prime (225590461).

It can be written as a sum of positive squares in only one way, i.e., 180472356 + 45118089 = 13434^2 + 6717^2 .

It is not a de Polignac number, because 225590445 - 2⁴ = 225590429 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 99636 + ... + 101874.

It is an arithmetic number, because the mean of its divisors is an integer number (21733231).

Almost surely, 2^225590445 is an apocalyptic number.

It is an amenable number.

225590445 is a deficient number, since it is larger than the sum of its proper divisors (165607713).

225590445 is an frugal number, since it uses more digits than its factorization.

225590445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4489 (or 2247 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The square root of 225590445 is about 15019.6686048661. The cubic root of 225590445 is about 608.7517653324.

Multiplying 225590445 by its product of nonzero digits (72000), we get a square (16242512040000 = 4030200²).

The spelling of 225590445 in words is "two hundred twenty-five million, five hundred ninety thousand, four hundred forty-five".