225665756 has 6 divisors (see below), whose sum is σ = 394915080. Its totient is φ = 112832876.

The previous prime is 225665749. The next prime is 225665767. The reversal of 225665756 is 657566522.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28208216 + ... + 28208223.

It is an arithmetic number, because the mean of its divisors is an integer number (65819180).

Almost surely, 2^225665756 is an apocalyptic number.

It is an amenable number.

225665756 is a deficient number, since it is larger than the sum of its proper divisors (169249324).

225665756 is a wasteful number, since it uses less digits than its factorization.

225665756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56416443 (or 56416441 counting only the distinct ones).

The product of its digits is 756000, while the sum is 44.

The square root of 225665756 is about 15022.1754749437. The cubic root of 225665756 is about 608.8194995893.

The spelling of 225665756 in words is "two hundred twenty-five million, six hundred sixty-five thousand, seven hundred fifty-six".