233981 has 8 divisors (see below), whose sum is σ = 259200. Its totient is φ = 209440.

The previous prime is 233969. The next prime is 233983. The reversal of 233981 is 189332.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 233981 - 2⁶ = 233917 is a prime.

It is a super-2 number, since 2×233981² = 109494216722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 233981.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 233981.

It is not an unprimeable number, because it can be changed into a prime (233983) 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, 860 + ... + 1098.

It is an arithmetic number, because the mean of its divisors is an integer number (32400).

2²³³⁹⁸¹ is an apocalyptic number.

It is an amenable number.

233981 is a deficient number, since it is larger than the sum of its proper divisors (25219).

233981 is a wasteful number, since it uses less digits than its factorization.

233981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339.

The product of its digits is 1296, while the sum is 26.

The square root of 233981 is about 483.7158256663. The cubic root of 233981 is about 61.6207335896.

It can be divided in two parts, 23 and 3981, that added together give a palindrome (4004).

The spelling of 233981 in words is "two hundred thirty-three thousand, nine hundred eighty-one".