259216081 has 2 divisors, whose sum is σ = 259216082. Its totient is φ = 259216080.

The previous prime is 259216039. The next prime is 259216091. The reversal of 259216081 is 180612952.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 192238225 + 66977856 = 13865^2 + 8184^2 .

It is a cyclic number.

It is not a de Polignac number, because 259216081 - 2⁹ = 259215569 is a prime.

It is a super-2 number, since 2×259216081² = 134385953297997122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (259216091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129608040 + 129608041.

It is an arithmetic number, because the mean of its divisors is an integer number (129608041).

Almost surely, 2^259216081 is an apocalyptic number.

It is an amenable number.

259216081 is a deficient number, since it is larger than the sum of its proper divisors (1).

259216081 is an equidigital number, since it uses as much as digits as its factorization.

259216081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 259216081 is about 16100.1888498241. The cubic root of 259216081 is about 637.6083268946.

The spelling of 259216081 in words is "two hundred fifty-nine million, two hundred sixteen thousand, eighty-one".