225618866 has 32 divisors (see below), whose sum is σ = 391920768. Its totient is φ = 96272640.

The previous prime is 225618857. The next prime is 225618871. The reversal of 225618866 is 668816522.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 273731 + ... + 274553.

It is an arithmetic number, because the mean of its divisors is an integer number (12247524).

Almost surely, 2^225618866 is an apocalyptic number.

225618866 is a deficient number, since it is larger than the sum of its proper divisors (166301902).

225618866 is a wasteful number, since it uses less digits than its factorization.

225618866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1586.

The product of its digits is 276480, while the sum is 44.

The square root of 225618866 is about 15020.6147011366. The cubic root of 225618866 is about 608.7773287783. Note that the first 3 decimals are identical.

The spelling of 225618866 in words is "two hundred twenty-five million, six hundred eighteen thousand, eight hundred sixty-six".