225170923 has 2 divisors, whose sum is σ = 225170924. Its totient is φ = 225170922.

The previous prime is 225170867. The next prime is 225170927. The reversal of 225170923 is 329071522.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 225170923 - 2⁹ = 225170411 is a prime.

It is not a weakly prime, because it can be changed into another prime (225170927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112585461 + 112585462.

It is an arithmetic number, because the mean of its divisors is an integer number (112585462).

Almost surely, 2^225170923 is an apocalyptic number.

225170923 is a deficient number, since it is larger than the sum of its proper divisors (1).

225170923 is an equidigital number, since it uses as much as digits as its factorization.

225170923 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 225170923 is about 15005.6963517192. The cubic root of 225170923 is about 608.3741736431.

The spelling of 225170923 in words is "two hundred twenty-five million, one hundred seventy thousand, nine hundred twenty-three".