181134225 has 30 divisors (see below), whose sum is σ = 335526950. Its totient is φ = 96603840.

The previous prime is 181134221. The next prime is 181134241. The reversal of 181134225 is 522431181.

It can be written as a sum of positive squares in 3 ways, for example, as 33074001 + 148060224 = 5751^2 + 12168^2 .

It is not a de Polignac number, because 181134225 - 2² = 181134221 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (181134221) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 42700 + ... + 46749.

Almost surely, 2^181134225 is an apocalyptic number.

181134225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

181134225 is a deficient number, since it is larger than the sum of its proper divisors (154392725).

181134225 is an equidigital number, since it uses as much as digits as its factorization.

181134225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89471 (or 89457 counting only the distinct ones).

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

The square root of 181134225 is about 13458.6115554317. The cubic root of 181134225 is about 565.8050756982.

The spelling of 181134225 in words is "one hundred eighty-one million, one hundred thirty-four thousand, two hundred twenty-five".