225465181 has 2 divisors, whose sum is σ = 225465182. Its totient is φ = 225465180.

The previous prime is 225465167. The next prime is 225465187. The reversal of 225465181 is 181564522.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 209062681 + 16402500 = 14459^2 + 4050^2 .

It is a cyclic number.

It is not a de Polignac number, because 225465181 - 2⁹ = 225464669 is a prime.

It is a super-2 number, since 2×225465181² = 101669095686725522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225465187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112732590 + 112732591.

It is an arithmetic number, because the mean of its divisors is an integer number (112732591).

Almost surely, 2^225465181 is an apocalyptic number.

It is an amenable number.

225465181 is a deficient number, since it is larger than the sum of its proper divisors (1).

225465181 is an equidigital number, since it uses as much as digits as its factorization.

225465181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19200, while the sum is 34.

The square root of 225465181 is about 15015.4980270386. The cubic root of 225465181 is about 608.6390702527.

The spelling of 225465181 in words is "two hundred twenty-five million, four hundred sixty-five thousand, one hundred eighty-one".