251398352071 has 2 divisors, whose sum is σ = 251398352072. Its totient is φ = 251398352070.

The previous prime is 251398352027. The next prime is 251398352083. The reversal of 251398352071 is 170253893152.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 251398352071 - 2¹⁹ = 251397827783 is a prime.

It is a super-2 number, since 2×251398352071² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (251398332071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125699176035 + 125699176036.

It is an arithmetic number, because the mean of its divisors is an integer number (125699176036).

Almost surely, 2^251398352071 is an apocalyptic number.

251398352071 is a deficient number, since it is larger than the sum of its proper divisors (1).

251398352071 is an equidigital number, since it uses as much as digits as its factorization.

251398352071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 453600, while the sum is 46.

The spelling of 251398352071 in words is "two hundred fifty-one billion, three hundred ninety-eight million, three hundred fifty-two thousand, seventy-one".