258831 has 6 divisors (see below), whose sum is σ = 373880. Its totient is φ = 172548.

The previous prime is 258827. The next prime is 258847. The reversal of 258831 is 138852.

It is a happy number.

It is not a de Polignac number, because 258831 - 2² = 258827 is a prime.

It is a super-2 number, since 2×258831² = 133986973122, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 258795 and 258804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (258871) 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, 14371 + ... + 14388.

2²⁵⁸⁸³¹ is an apocalyptic number.

258831 is a deficient number, since it is larger than the sum of its proper divisors (115049).

258831 is a wasteful number, since it uses less digits than its factorization.

258831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28765 (or 28762 counting only the distinct ones).

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

The square root of 258831 is about 508.7543611607. The cubic root of 258831 is about 63.7292435310.

It can be divided in two parts, 258 and 831, that added together give a square (1089 = 33²).

The spelling of 258831 in words is "two hundred fifty-eight thousand, eight hundred thirty-one".