225518657 has 64 divisors (see below), whose sum is σ = 313528320. Its totient is φ = 157158144.

The previous prime is 225518653. The next prime is 225518669. The reversal of 225518657 is 756815522.

It is not a de Polignac number, because 225518657 - 2² = 225518653 is a prime.

It is not an unprimeable number, because it can be changed into a prime (225518653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2107598 + ... + 2107704.

It is an arithmetic number, because the mean of its divisors is an integer number (4898880).

Almost surely, 2^225518657 is an apocalyptic number.

It is an amenable number.

225518657 is a deficient number, since it is larger than the sum of its proper divisors (88009663).

225518657 is a wasteful number, since it uses less digits than its factorization.

225518657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222.

The product of its digits is 168000, while the sum is 41.

The square root of 225518657 is about 15017.2786149821. The cubic root of 225518657 is about 608.6871856053.

The spelling of 225518657 in words is "two hundred twenty-five million, five hundred eighteen thousand, six hundred fifty-seven".