225564251 has 4 divisors (see below), whose sum is σ = 246070104. Its totient is φ = 205058400.

The previous prime is 225564223. The next prime is 225564263. The reversal of 225564251 is 152465522.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 225564251 - 2¹⁸ = 225302107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225564851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10252910 + ... + 10252931.

It is an arithmetic number, because the mean of its divisors is an integer number (61517526).

Almost surely, 2^225564251 is an apocalyptic number.

225564251 is a deficient number, since it is larger than the sum of its proper divisors (20505853).

225564251 is a wasteful number, since it uses less digits than its factorization.

225564251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20505852.

The product of its digits is 24000, while the sum is 32.

The square root of 225564251 is about 15018.7965896073. The cubic root of 225564251 is about 608.7282030742.

The spelling of 225564251 in words is "two hundred twenty-five million, five hundred sixty-four thousand, two hundred fifty-one".