51051439973 has 2 divisors, whose sum is σ = 51051439974. Its totient is φ = 51051439972.

The previous prime is 51051439963. The next prime is 51051439981. The reversal of 51051439973 is 37993415015.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31109198884 + 19942241089 = 176378^2 + 141217^2 .

It is a cyclic number.

It is not a de Polignac number, because 51051439973 - 2²⁶ = 50984331109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51051439963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25525719986 + 25525719987.

It is an arithmetic number, because the mean of its divisors is an integer number (25525719987).

Almost surely, 2^51051439973 is an apocalyptic number.

It is an amenable number.

51051439973 is a deficient number, since it is larger than the sum of its proper divisors (1).

51051439973 is an equidigital number, since it uses as much as digits as its factorization.

51051439973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 510300, while the sum is 47.

The spelling of 51051439973 in words is "fifty-one billion, fifty-one million, four hundred thirty-nine thousand, nine hundred seventy-three".