225508145 has 12 divisors (see below), whose sum is σ = 287466204. Its totient is φ = 169793280.

The previous prime is 225508139. The next prime is 225508177. The reversal of 225508145 is 541805522.

It can be written as a sum of positive squares in 6 ways, for example, as 72318016 + 153190129 = 8504^2 + 12377^2 .

It is not a de Polignac number, because 225508145 - 2⁸ = 225507889 is a prime.

It is a super-2 number, since 2×225508145² = 101707846922682050, which contains 22 as substring.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 76586 + ... + 79475.

It is an arithmetic number, because the mean of its divisors is an integer number (23955517).

Almost surely, 2^225508145 is an apocalyptic number.

It is an amenable number.

225508145 is a deficient number, since it is larger than the sum of its proper divisors (61958059).

225508145 is a wasteful number, since it uses less digits than its factorization.

225508145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156100 (or 156083 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 32.

The square root of 225508145 is about 15016.9286140675. The cubic root of 225508145 is about 608.6777279708.

The spelling of 225508145 in words is "two hundred twenty-five million, five hundred eight thousand, one hundred forty-five".