251345112943 has 2 divisors, whose sum is σ = 251345112944. Its totient is φ = 251345112942.

The previous prime is 251345112917. The next prime is 251345112971. The reversal of 251345112943 is 349211543152.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-251345112943 is a prime.

It is a super-2 number, since 2×251345112943² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 251345112896 and 251345112905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (251345112043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125672556471 + 125672556472.

It is an arithmetic number, because the mean of its divisors is an integer number (125672556472).

Almost surely, 2^251345112943 is an apocalyptic number.

251345112943 is a deficient number, since it is larger than the sum of its proper divisors (1).

251345112943 is an equidigital number, since it uses as much as digits as its factorization.

251345112943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 129600, while the sum is 40.

The spelling of 251345112943 in words is "two hundred fifty-one billion, three hundred forty-five million, one hundred twelve thousand, nine hundred forty-three".