251131130329 has 2 divisors, whose sum is σ = 251131130330. Its totient is φ = 251131130328.

The previous prime is 251131130297. The next prime is 251131130381. The reversal of 251131130329 is 923031131152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 240147042304 + 10984088025 = 490048^2 + 104805^2 .

It is a cyclic number.

It is not a de Polignac number, because 251131130329 - 2⁵ = 251131130297 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 251131130329.

It is not a weakly prime, because it can be changed into another prime (251131130399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125565565164 + 125565565165.

It is an arithmetic number, because the mean of its divisors is an integer number (125565565165).

Almost surely, 2^251131130329 is an apocalyptic number.

It is an amenable number.

251131130329 is a deficient number, since it is larger than the sum of its proper divisors (1).

251131130329 is an equidigital number, since it uses as much as digits as its factorization.

251131130329 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4860, while the sum is 31.

The spelling of 251131130329 in words is "two hundred fifty-one billion, one hundred thirty-one million, one hundred thirty thousand, three hundred twenty-nine".