225398574 has 48 divisors (see below), whose sum is σ = 511134624. Its totient is φ = 71649600.

The previous prime is 225398573. The next prime is 225398581. The reversal of 225398574 is 475893522.

225398574 is a `hidden beast` number, since 22 + 53 + 9 + 8 + 574 = 666.

It is a super-2 number, since 2×225398574² = 101609034322466952, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225398573) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 190264 + ... + 191444.

It is an arithmetic number, because the mean of its divisors is an integer number (10648638).

Almost surely, 2^225398574 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 225398574, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (255567312).

225398574 is an abundant number, since it is smaller than the sum of its proper divisors (285736050).

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

225398574 is a wasteful number, since it uses less digits than its factorization.

225398574 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1673 (or 1670 counting only the distinct ones).

The product of its digits is 604800, while the sum is 45.

The square root of 225398574 is about 15013.2799214562. The cubic root of 225398574 is about 608.5791295631.

It can be divided in two parts, 22539 and 8574, that added together give a palindrome (31113).

The spelling of 225398574 in words is "two hundred twenty-five million, three hundred ninety-eight thousand, five hundred seventy-four".