225450091 has 2 divisors, whose sum is σ = 225450092. Its totient is φ = 225450090.

The previous prime is 225450047. The next prime is 225450179. The reversal of 225450091 is 190054522.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 225450091 - 2¹¹ = 225448043 is a prime.

It is equal to p_12406159 and since 225450091 and 12406159 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (225450691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112725045 + 112725046.

It is an arithmetic number, because the mean of its divisors is an integer number (112725046).

Almost surely, 2^225450091 is an apocalyptic number.

225450091 is a deficient number, since it is larger than the sum of its proper divisors (1).

225450091 is an equidigital number, since it uses as much as digits as its factorization.

225450091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 225450091 is about 15014.9955377949. The cubic root of 225450091 is about 608.6254915582.

The spelling of 225450091 in words is "two hundred twenty-five million, four hundred fifty thousand, ninety-one".