225245155 has 24 divisors (see below), whose sum is σ = 290269728. Its totient is φ = 167743488.

The previous prime is 225245147. The next prime is 225245161. The reversal of 225245155 is 551542522.

It is a happy number.

It is not a de Polignac number, because 225245155 - 2³ = 225245147 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 139362 + ... + 140968.

It is an arithmetic number, because the mean of its divisors is an integer number (12094572).

Almost surely, 2^225245155 is an apocalyptic number.

225245155 is a deficient number, since it is larger than the sum of its proper divisors (65024573).

225245155 is a wasteful number, since it uses less digits than its factorization.

225245155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1743 (or 1726 counting only the distinct ones).

The product of its digits is 20000, while the sum is 31.

The square root of 225245155 is about 15008.1696085832. The cubic root of 225245155 is about 608.4410204474.

Adding to 225245155 its reverse (551542522), we get a palindrome (776787677).

The spelling of 225245155 in words is "two hundred twenty-five million, two hundred forty-five thousand, one hundred fifty-five".