259521131 has 2 divisors, whose sum is σ = 259521132. Its totient is φ = 259521130.

The previous prime is 259521089. The next prime is 259521139. The reversal of 259521131 is 131125952.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 259521131 - 2²⁶ = 192412267 is a prime.

It is a super-2 number, since 2×259521131² = 134702434871038322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 259521094 and 259521103.

It is not a weakly prime, because it can be changed into another prime (259521139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129760565 + 129760566.

It is an arithmetic number, because the mean of its divisors is an integer number (129760566).

Almost surely, 2^259521131 is an apocalyptic number.

259521131 is a deficient number, since it is larger than the sum of its proper divisors (1).

259521131 is an equidigital number, since it uses as much as digits as its factorization.

259521131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2700, while the sum is 29.

The square root of 259521131 is about 16109.6595556827. The cubic root of 259521131 is about 637.8583450407.

The spelling of 259521131 in words is "two hundred fifty-nine million, five hundred twenty-one thousand, one hundred thirty-one".