181233 has 12 divisors (see below), whose sum is σ = 282100. Its totient is φ = 111456.

The previous prime is 181219. The next prime is 181243. The reversal of 181233 is 332181.

It can be written as a sum of positive squares in 2 ways, for example, as 42849 + 138384 = 207^2 + 372^2 .

It is not a de Polignac number, because 181233 - 2⁵ = 181201 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181213) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 658 + ... + 891.

2¹⁸¹²³³ is an apocalyptic number.

181233 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

181233 is a deficient number, since it is larger than the sum of its proper divisors (100867).

181233 is a wasteful number, since it uses less digits than its factorization.

181233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1568 (or 1565 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 181233 is about 425.7146931925. The cubic root of 181233 is about 56.5907904122.

It can be divided in two parts, 181 and 233, that added together give a palindrome (414).

The spelling of 181233 in words is "one hundred eighty-one thousand, two hundred thirty-three".