225665755 has 32 divisors (see below), whose sum is σ = 326937600. Its totient is φ = 146074752.

The previous prime is 225665749. The next prime is 225665767. The reversal of 225665755 is 557566522.

It is a cyclic number.

It is not a de Polignac number, because 225665755 - 2⁹ = 225665243 is a prime.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 291549 + ... + 292321.

It is an arithmetic number, because the mean of its divisors is an integer number (10216800).

Almost surely, 2^225665755 is an apocalyptic number.

225665755 is a deficient number, since it is larger than the sum of its proper divisors (101271845).

225665755 is a wasteful number, since it uses less digits than its factorization.

225665755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1243.

The product of its digits is 630000, while the sum is 43.

The square root of 225665755 is about 15022.1754416596. The cubic root of 225665755 is about 608.8194986900.

The spelling of 225665755 in words is "two hundred twenty-five million, six hundred sixty-five thousand, seven hundred fifty-five".