259206581 has 2 divisors, whose sum is σ = 259206582. Its totient is φ = 259206580.

The previous prime is 259206559. The next prime is 259206617. The reversal of 259206581 is 185602952.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 255040900 + 4165681 = 15970^2 + 2041^2 .

It is a cyclic number.

It is not a de Polignac number, because 259206581 - 2¹⁸ = 258944437 is a prime.

It is a super-2 number, since 2×259206581² = 134376103267419122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (259206511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129603290 + 129603291.

It is an arithmetic number, because the mean of its divisors is an integer number (129603291).

Almost surely, 2^259206581 is an apocalyptic number.

It is an amenable number.

259206581 is a deficient number, since it is larger than the sum of its proper divisors (1).

259206581 is an equidigital number, since it uses as much as digits as its factorization.

259206581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43200, while the sum is 38.

The square root of 259206581 is about 16099.8938195256. The cubic root of 259206581 is about 637.6005375720.

The spelling of 259206581 in words is "two hundred fifty-nine million, two hundred six thousand, five hundred eighty-one".