225561655 has 16 divisors (see below), whose sum is σ = 296309664. Its totient is φ = 163473280.

The previous prime is 225561653. The next prime is 225561683. The reversal of 225561655 is 556165522.

It is not a de Polignac number, because 225561655 - 2¹ = 225561653 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 (225561653) 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, 9117 + ... + 23113.

It is an arithmetic number, because the mean of its divisors is an integer number (18519354).

Almost surely, 2^225561655 is an apocalyptic number.

225561655 is a deficient number, since it is larger than the sum of its proper divisors (70748009).

225561655 is a wasteful number, since it uses less digits than its factorization.

225561655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14306.

The product of its digits is 90000, while the sum is 37.

The square root of 225561655 is about 15018.7101643250. The cubic root of 225561655 is about 608.7258677980.

The spelling of 225561655 in words is "two hundred twenty-five million, five hundred sixty-one thousand, six hundred fifty-five".