259531 has 2 divisors, whose sum is σ = 259532. Its totient is φ = 259530.

The previous prime is 259517. The next prime is 259537. The reversal of 259531 is 135952.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 259531 - 2⁵ = 259499 is a prime.

It is a super-2 number, since 2×259531² = 134712679922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 259496 and 259505.

It is not a weakly prime, because it can be changed into another prime (259537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129765 + 129766.

It is an arithmetic number, because the mean of its divisors is an integer number (129766).

2²⁵⁹⁵³¹ is an apocalyptic number.

259531 is a deficient number, since it is larger than the sum of its proper divisors (1).

259531 is an equidigital number, since it uses as much as digits as its factorization.

259531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1350, while the sum is 25.

The square root of 259531 is about 509.4418514414. The cubic root of 259531 is about 63.7866430374.

The spelling of 259531 in words is "two hundred fifty-nine thousand, five hundred thirty-one".