225521564 has 12 divisors (see below), whose sum is σ = 415434600. Its totient is φ = 106825968.

The previous prime is 225521533. The next prime is 225521567. The reversal of 225521564 is 465125522.

It is a self number, because there is not a number n which added to its sum of digits gives 225521564.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225521567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1483619 + ... + 1483770.

It is an arithmetic number, because the mean of its divisors is an integer number (34619550).

Almost surely, 2^225521564 is an apocalyptic number.

It is an amenable number.

225521564 is a deficient number, since it is larger than the sum of its proper divisors (189913036).

225521564 is a wasteful number, since it uses less digits than its factorization.

225521564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2967412 (or 2967410 counting only the distinct ones).

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

The square root of 225521564 is about 15017.3754031788. The cubic root of 225521564 is about 608.6898009781.

The spelling of 225521564 in words is "two hundred twenty-five million, five hundred twenty-one thousand, five hundred sixty-four".