225798091 has 2 divisors, whose sum is σ = 225798092. Its totient is φ = 225798090.

The previous prime is 225798077. The next prime is 225798101. The reversal of 225798091 is 190897522.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-225798091 is a prime.

It is not a weakly prime, because it can be changed into another prime (225798691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112899045 + 112899046.

It is an arithmetic number, because the mean of its divisors is an integer number (112899046).

Almost surely, 2^225798091 is an apocalyptic number.

225798091 is a deficient number, since it is larger than the sum of its proper divisors (1).

225798091 is an equidigital number, since it uses as much as digits as its factorization.

225798091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 225798091 is about 15026.5794843670. The cubic root of 225798091 is about 608.9384843895.

The spelling of 225798091 in words is "two hundred twenty-five million, seven hundred ninety-eight thousand, ninety-one".