258531 has 16 divisors (see below), whose sum is σ = 424704. Its totient is φ = 136224.

The previous prime is 258527. The next prime is 258539. The reversal of 258531 is 135852.

It is not a de Polignac number, because 258531 - 2² = 258527 is a prime.

It is a super-2 number, since 2×258531² = 133676555922, which contains 22 as substring.

It is a zygodrome in base 2.

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 258531.

It is not an unprimeable number, because it can be changed into a prime (258539) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 201 + ... + 746.

It is an arithmetic number, because the mean of its divisors is an integer number (26544).

2²⁵⁸⁵³¹ is an apocalyptic number.

258531 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

258531 is a deficient number, since it is larger than the sum of its proper divisors (166173).

258531 is a wasteful number, since it uses less digits than its factorization.

258531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 970.

The product of its digits is 1200, while the sum is 24.

The square root of 258531 is about 508.4594379102. The cubic root of 258531 is about 63.7046120605.

The spelling of 258531 in words is "two hundred fifty-eight thousand, five hundred thirty-one".