225561656 has 16 divisors (see below), whose sum is σ = 423087840. Its totient is φ = 112738240.

The previous prime is 225561653. The next prime is 225561683. The reversal of 225561656 is 656165522.

It is a happy number.

225561656 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

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 3 ways as a sum of consecutive naturals, for example, 36641 + ... + 42351.

It is an arithmetic number, because the mean of its divisors is an integer number (26442990).

Almost surely, 2^225561656 is an apocalyptic number.

It is an amenable number.

225561656 is a deficient number, since it is larger than the sum of its proper divisors (197526184).

225561656 is a wasteful number, since it uses less digits than its factorization.

225561656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10654 (or 10650 counting only the distinct ones).

The product of its digits is 108000, while the sum is 38.

The square root of 225561656 is about 15018.7101976168. The cubic root of 225561656 is about 608.7258686976.

The spelling of 225561656 in words is "two hundred twenty-five million, five hundred sixty-one thousand, six hundred fifty-six".