225518670 has 72 divisors (see below), whose sum is σ = 634964616. Its totient is φ = 55508544.

The previous prime is 225518669. The next prime is 225518687. The reversal of 225518670 is 76815522.

It is a happy number.

225518670 is a `hidden beast` number, since 22 + 551 + 86 + 7 + 0 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 7797 + ... + 22623.

It is an arithmetic number, because the mean of its divisors is an integer number (8818953).

Almost surely, 2^225518670 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 225518670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (317482308).

225518670 is an abundant number, since it is smaller than the sum of its proper divisors (409445946).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

225518670 is a wasteful number, since it uses less digits than its factorization.

225518670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14866 (or 14850 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The square root of 225518670 is about 15017.2790478169. The cubic root of 225518670 is about 608.6871973012.

The spelling of 225518670 in words is "two hundred twenty-five million, five hundred eighteen thousand, six hundred seventy".