235881 has 6 divisors (see below), whose sum is σ = 340730. Its totient is φ = 157248.

The previous prime is 235877. The next prime is 235889. The reversal of 235881 is 188532.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 189225 + 46656 = 435^2 + 216^2 .

It is not a de Polignac number, because 235881 - 2² = 235877 is a prime.

It is a super-2 number, since 2×235881² = 111279692322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (235889) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13096 + ... + 13113.

2²³⁵⁸⁸¹ is an apocalyptic number.

It is an amenable number.

235881 is a deficient number, since it is larger than the sum of its proper divisors (104849).

235881 is a wasteful number, since it uses less digits than its factorization.

235881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26215 (or 26212 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 235881 is about 485.6758178044. The cubic root of 235881 is about 61.7870774501.

The spelling of 235881 in words is "two hundred thirty-five thousand, eight hundred eighty-one".