51004043291 has 2 divisors, whose sum is σ = 51004043292. Its totient is φ = 51004043290.

The previous prime is 51004043287. The next prime is 51004043329. The reversal of 51004043291 is 19234040015.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51004043291 - 2² = 51004043287 is a prime.

It is a super-2 number, since 2×51004043291² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51004043261) 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, 25502021645 + 25502021646.

It is an arithmetic number, because the mean of its divisors is an integer number (25502021646).

Almost surely, 2^51004043291 is an apocalyptic number.

51004043291 is a deficient number, since it is larger than the sum of its proper divisors (1).

51004043291 is an equidigital number, since it uses as much as digits as its factorization.

51004043291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 29.

The spelling of 51004043291 in words is "fifty-one billion, four million, forty-three thousand, two hundred ninety-one".