225760991 has 2 divisors, whose sum is σ = 225760992. Its totient is φ = 225760990.

The previous prime is 225760981. The next prime is 225761023. The reversal of 225760991 is 199067522.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 225760991 - 2¹⁰ = 225759967 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 (225760961) 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, 112880495 + 112880496.

It is an arithmetic number, because the mean of its divisors is an integer number (112880496).

Almost surely, 2^225760991 is an apocalyptic number.

225760991 is a deficient number, since it is larger than the sum of its proper divisors (1).

225760991 is an equidigital number, since it uses as much as digits as its factorization.

225760991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 68040, while the sum is 41.

The square root of 225760991 is about 15025.3449544428. The cubic root of 225760991 is about 608.9051317969.

The spelling of 225760991 in words is "two hundred twenty-five million, seven hundred sixty thousand, nine hundred ninety-one".