51021039983 has 2 divisors, whose sum is σ = 51021039984. Its totient is φ = 51021039982.

The previous prime is 51021039977. The next prime is 51021040013. The reversal of 51021039983 is 38993012015.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51021039983 - 2⁶ = 51021039919 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51021039983.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51021039913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25510519991 + 25510519992.

It is an arithmetic number, because the mean of its divisors is an integer number (25510519992).

Almost surely, 2^51021039983 is an apocalyptic number.

51021039983 is a deficient number, since it is larger than the sum of its proper divisors (1).

51021039983 is an equidigital number, since it uses as much as digits as its factorization.

51021039983 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58320, while the sum is 41.

The spelling of 51021039983 in words is "fifty-one billion, twenty-one million, thirty-nine thousand, nine hundred eighty-three".