225521565 has 8 divisors (see below), whose sum is σ = 360834528. Its totient is φ = 120278160.

The previous prime is 225521533. The next prime is 225521567. The reversal of 225521565 is 565125522.

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

It is not a de Polignac number, because 225521565 - 2⁵ = 225521533 is a prime.

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

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7517371 + ... + 7517400.

It is an arithmetic number, because the mean of its divisors is an integer number (45104316).

Almost surely, 2^225521565 is an apocalyptic number.

It is an amenable number.

225521565 is a deficient number, since it is larger than the sum of its proper divisors (135312963).

225521565 is a wasteful number, since it uses less digits than its factorization.

225521565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15034779.

The product of its digits is 30000, while the sum is 33.

The square root of 225521565 is about 15017.3754364736. The cubic root of 225521565 is about 608.6898018777.

The spelling of 225521565 in words is "two hundred twenty-five million, five hundred twenty-one thousand, five hundred sixty-five".