181228275 has 36 divisors (see below), whose sum is σ = 325994760. Its totient is φ = 96240000.

The previous prime is 181228261. The next prime is 181228277. The reversal of 181228275 is 572822181.

It is not a de Polignac number, because 181228275 - 2²⁵ = 147673843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (181228277) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 54871 + ... + 58079.

It is an arithmetic number, because the mean of its divisors is an integer number (9055410).

Almost surely, 2^181228275 is an apocalyptic number.

181228275 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

181228275 is a deficient number, since it is larger than the sum of its proper divisors (144766485).

181228275 is a wasteful number, since it uses less digits than its factorization.

181228275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3476 (or 3468 counting only the distinct ones).

The product of its digits is 17920, while the sum is 36.

The square root of 181228275 is about 13462.1051474129. The cubic root of 181228275 is about 565.9029860737.

It can be divided in two parts, 181228 and 275, that added together give a triangular number (181503 = T₆₀₂).

The spelling of 181228275 in words is "one hundred eighty-one million, two hundred twenty-eight thousand, two hundred seventy-five".