225157725 has 72 divisors (see below), whose sum is σ = 450547552. Its totient is φ = 110808000.

The previous prime is 225157717. The next prime is 225157729. The reversal of 225157725 is 527751522.

It is not a de Polignac number, because 225157725 - 2³ = 225157717 is a prime.

It is a super-2 number, since 2×225157725² = 101392002254351250, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 225157725.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225157729) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 77550 + ... + 80400.

Almost surely, 2^225157725 is an apocalyptic number.

225157725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

225157725 is an abundant number, since it is smaller than the sum of its proper divisors (225389827).

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

225157725 is a wasteful number, since it uses less digits than its factorization.

225157725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2889 (or 2872 counting only the distinct ones).

The product of its digits is 49000, while the sum is 36.

The square root of 225157725 is about 15005.2565789459. The cubic root of 225157725 is about 608.3622871480.

The spelling of 225157725 in words is "two hundred twenty-five million, one hundred fifty-seven thousand, seven hundred twenty-five".