225166256687 has 2 divisors, whose sum is σ = 225166256688. Its totient is φ = 225166256686.

The previous prime is 225166256671. The next prime is 225166256797. The reversal of 225166256687 is 786652661522.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 225166256687 - 2⁴ = 225166256671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225166256387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112583128343 + 112583128344.

It is an arithmetic number, because the mean of its divisors is an integer number (112583128344).

Almost surely, 2^225166256687 is an apocalyptic number.

225166256687 is a deficient number, since it is larger than the sum of its proper divisors (1).

225166256687 is an equidigital number, since it uses as much as digits as its factorization.

225166256687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14515200, while the sum is 56.

The spelling of 225166256687 in words is "two hundred twenty-five billion, one hundred sixty-six million, two hundred fifty-six thousand, six hundred eighty-seven".