51715417399 has 2 divisors, whose sum is σ = 51715417400. Its totient is φ = 51715417398.

The previous prime is 51715417381. The next prime is 51715417427. The reversal of 51715417399 is 99371451715.

It is a happy number.

51715417399 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51715417399 - 2³⁵ = 17355679031 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51715417309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25857708699 + 25857708700.

It is an arithmetic number, because the mean of its divisors is an integer number (25857708700).

Almost surely, 2^51715417399 is an apocalyptic number.

51715417399 is a deficient number, since it is larger than the sum of its proper divisors (1).

51715417399 is an equidigital number, since it uses as much as digits as its factorization.

51715417399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1190700, while the sum is 52.

The spelling of 51715417399 in words is "fifty-one billion, seven hundred fifteen million, four hundred seventeen thousand, three hundred ninety-nine".