51431438263 has 2 divisors, whose sum is σ = 51431438264. Its totient is φ = 51431438262.

The previous prime is 51431438249. The next prime is 51431438297. The reversal of 51431438263 is 36283413415.

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-51431438263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51431438363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25715719131 + 25715719132.

It is an arithmetic number, because the mean of its divisors is an integer number (25715719132).

Almost surely, 2^51431438263 is an apocalyptic number.

51431438263 is a deficient number, since it is larger than the sum of its proper divisors (1).

51431438263 is an equidigital number, since it uses as much as digits as its factorization.

51431438263 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 207360, while the sum is 40.

The spelling of 51431438263 in words is "fifty-one billion, four hundred thirty-one million, four hundred thirty-eight thousand, two hundred sixty-three".