251530259 has 2 divisors, whose sum is σ = 251530260. Its totient is φ = 251530258.

The previous prime is 251530211. The next prime is 251530273. The reversal of 251530259 is 952035152.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 251530259 - 2⁸ = 251530003 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (251533259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125765129 + 125765130.

It is an arithmetic number, because the mean of its divisors is an integer number (125765130).

Almost surely, 2^251530259 is an apocalyptic number.

251530259 is a deficient number, since it is larger than the sum of its proper divisors (1).

251530259 is an equidigital number, since it uses as much as digits as its factorization.

251530259 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13500, while the sum is 32.

The square root of 251530259 is about 15859.7055142900. The cubic root of 251530259 is about 631.2432483152.

The spelling of 251530259 in words is "two hundred fifty-one million, five hundred thirty thousand, two hundred fifty-nine".