225765091 has 2 divisors, whose sum is σ = 225765092. Its totient is φ = 225765090.

The previous prime is 225765053. The next prime is 225765103. The reversal of 225765091 is 190567522.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 225765091 - 2⁷ = 225764963 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 225765091.

It is not a weakly prime, because it can be changed into another prime (225765041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112882545 + 112882546.

It is an arithmetic number, because the mean of its divisors is an integer number (112882546).

Almost surely, 2^225765091 is an apocalyptic number.

225765091 is a deficient number, since it is larger than the sum of its proper divisors (1).

225765091 is an equidigital number, since it uses as much as digits as its factorization.

225765091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37800, while the sum is 37.

The square root of 225765091 is about 15025.4813899589. The cubic root of 225765091 is about 608.9088178425.

The spelling of 225765091 in words is "two hundred twenty-five million, seven hundred sixty-five thousand, ninety-one".