225720365565 has 16 divisors (see below), whose sum is σ = 372802669056. Its totient is φ = 116500833600.

The previous prime is 225720365489. The next prime is 225720365569. The reversal of 225720365565 is 565563027522.

It is not a de Polignac number, because 225720365565 - 2²⁷ = 225586147837 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225720365569) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 242709606 + ... + 242710535.

It is an arithmetic number, because the mean of its divisors is an integer number (23300166816).

Almost surely, 2^225720365565 is an apocalyptic number.

It is an amenable number.

225720365565 is a deficient number, since it is larger than the sum of its proper divisors (147082303491).

225720365565 is a wasteful number, since it uses less digits than its factorization.

225720365565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485420180.

The product of its (nonzero) digits is 3780000, while the sum is 48.

The spelling of 225720365565 in words is "two hundred twenty-five billion, seven hundred twenty million, three hundred sixty-five thousand, five hundred sixty-five".