233681 has 12 divisors (see below), whose sum is σ = 287280. Its totient is φ = 189000.

The previous prime is 233669. The next prime is 233683. The reversal of 233681 is 186332.

233681 = T₁₄ + T₁₅ + ... + T₁₁₁.

It is not a de Polignac number, because 233681 - 2⁶ = 233617 is a prime.

It is a super-2 number, since 2×233681² = 109213619522, which contains 22 as substring.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 233681.

It is not an unprimeable number, because it can be changed into a prime (233683) 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, 806 + ... + 1056.

It is an arithmetic number, because the mean of its divisors is an integer number (23940).

2²³³⁶⁸¹ is an apocalyptic number.

It is an amenable number.

233681 is a deficient number, since it is larger than the sum of its proper divisors (53599).

233681 is a wasteful number, since it uses less digits than its factorization.

233681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284 (or 277 counting only the distinct ones).

The product of its digits is 864, while the sum is 23.

The square root of 233681 is about 483.4056267773. The cubic root of 233681 is about 61.5943865408.

The spelling of 233681 in words is "two hundred thirty-three thousand, six hundred eighty-one".