225668987 has 2 divisors, whose sum is σ = 225668988. Its totient is φ = 225668986.

The previous prime is 225668969. The next prime is 225669013. The reversal of 225668987 is 789866522.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 225668987 - 2⁸ = 225668731 is a prime.

It is not a weakly prime, because it can be changed into another prime (225668887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112834493 + 112834494.

It is an arithmetic number, because the mean of its divisors is an integer number (112834494).

Almost surely, 2^225668987 is an apocalyptic number.

225668987 is a deficient number, since it is larger than the sum of its proper divisors (1).

225668987 is an equidigital number, since it uses as much as digits as its factorization.

225668987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2903040, while the sum is 53.

The square root of 225668987 is about 15022.2830155739. The cubic root of 225668987 is about 608.8224051939.

The spelling of 225668987 in words is "two hundred twenty-five million, six hundred sixty-eight thousand, nine hundred eighty-seven".