225568621 has 8 divisors (see below), whose sum is σ = 228723200. Its totient is φ = 222421680.

The previous prime is 225568619. The next prime is 225568639. The reversal of 225568621 is 126865522.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 225568621 - 2¹ = 225568619 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225568601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83116 + ... + 85786.

It is an arithmetic number, because the mean of its divisors is an integer number (28590400).

Almost surely, 2^225568621 is an apocalyptic number.

It is an amenable number.

225568621 is a deficient number, since it is larger than the sum of its proper divisors (3154579).

225568621 is a wasteful number, since it uses less digits than its factorization.

225568621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3819.

The product of its digits is 57600, while the sum is 37.

The square root of 225568621 is about 15018.9420732620. The cubic root of 225568621 is about 608.7321341419.

It can be divided in two parts, 2255 and 68621, that added together give a triangular number (70876 = T₃₇₆).

The spelling of 225568621 in words is "two hundred twenty-five million, five hundred sixty-eight thousand, six hundred twenty-one".