225134181 has 8 divisors (see below), whose sum is σ = 333532160. Its totient is φ = 150089436.

The previous prime is 225134177. The next prime is 225134191. The reversal of 225134181 is 181431522.

It is not a de Polignac number, because 225134181 - 2² = 225134177 is a prime.

It is a super-2 number, since 2×225134181² = 101370798909081522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 8338303 = 225134181 / (2 + 2 + 5 + 1 + 3 + 4 + 1 + 8 + 1).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225134101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4169125 + ... + 4169178.

It is an arithmetic number, because the mean of its divisors is an integer number (41691520).

Almost surely, 2^225134181 is an apocalyptic number.

It is an amenable number.

225134181 is a deficient number, since it is larger than the sum of its proper divisors (108397979).

225134181 is an equidigital number, since it uses as much as digits as its factorization.

225134181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8338312 (or 8338306 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 225134181 is about 15004.4720333639. The cubic root of 225134181 is about 608.3410815969.

The spelling of 225134181 in words is "two hundred twenty-five million, one hundred thirty-four thousand, one hundred eighty-one".