51000043099 has 2 divisors, whose sum is σ = 51000043100. Its totient is φ = 51000043098.

The previous prime is 51000043097. The next prime is 51000043109. The reversal of 51000043099 is 99034000015.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51000043099 - 2¹ = 51000043097 is a prime.

Together with 51000043097, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 51000043099.

It is not a weakly prime, because it can be changed into another prime (51000043093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25500021549 + 25500021550.

It is an arithmetic number, because the mean of its divisors is an integer number (25500021550).

Almost surely, 2^51000043099 is an apocalyptic number.

51000043099 is a deficient number, since it is larger than the sum of its proper divisors (1).

51000043099 is an equidigital number, since it uses as much as digits as its factorization.

51000043099 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 51000043099 in words is "fifty-one billion, forty-three thousand, ninety-nine".