225081491 has 2 divisors, whose sum is σ = 225081492. Its totient is φ = 225081490.

The previous prime is 225081487. The next prime is 225081511. The reversal of 225081491 is 194180522.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 225081491 - 2² = 225081487 is a prime.

It is not a weakly prime, because it can be changed into another prime (225081481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112540745 + 112540746.

It is an arithmetic number, because the mean of its divisors is an integer number (112540746).

Almost surely, 2^225081491 is an apocalyptic number.

225081491 is a deficient number, since it is larger than the sum of its proper divisors (1).

225081491 is an equidigital number, since it uses as much as digits as its factorization.

225081491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 225081491 is about 15002.7161207563. The cubic root of 225081491 is about 608.2936195421.

The spelling of 225081491 in words is "two hundred twenty-five million, eighty-one thousand, four hundred ninety-one".