181225327 has 4 divisors (see below), whose sum is σ = 184196296. Its totient is φ = 178254360.

The previous prime is 181225309. The next prime is 181225351. The reversal of 181225327 is 723522181.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 723522181 = 2287 ⋅316363.

It is a cyclic number.

It is not a de Polignac number, because 181225327 - 2⁷ = 181225199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181225357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1485393 + ... + 1485514.

It is an arithmetic number, because the mean of its divisors is an integer number (46049074).

Almost surely, 2^181225327 is an apocalyptic number.

181225327 is a deficient number, since it is larger than the sum of its proper divisors (2970969).

181225327 is an equidigital number, since it uses as much as digits as its factorization.

181225327 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2970968.

The product of its digits is 6720, while the sum is 31.

The square root of 181225327 is about 13461.9956544340. The cubic root of 181225327 is about 565.8999175844.

The spelling of 181225327 in words is "one hundred eighty-one million, two hundred twenty-five thousand, three hundred twenty-seven".