225518687 has 2 divisors, whose sum is σ = 225518688. Its totient is φ = 225518686.

The previous prime is 225518669. The next prime is 225518701. The reversal of 225518687 is 786815522.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 225518687 - 2⁸ = 225518431 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225518987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112759343 + 112759344.

It is an arithmetic number, because the mean of its divisors is an integer number (112759344).

Almost surely, 2^225518687 is an apocalyptic number.

225518687 is a deficient number, since it is larger than the sum of its proper divisors (1).

225518687 is an equidigital number, since it uses as much as digits as its factorization.

225518687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 268800, while the sum is 44.

The square root of 225518687 is about 15017.2796138315. The cubic root of 225518687 is about 608.6872125959.

The spelling of 225518687 in words is "two hundred twenty-five million, five hundred eighteen thousand, six hundred eighty-seven".