51171925039 has 2 divisors, whose sum is σ = 51171925040. Its totient is φ = 51171925038.

The previous prime is 51171925003. The next prime is 51171925099. The reversal of 51171925039 is 93052917115.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51171925039 - 2¹⁵ = 51171892271 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51171924986 and 51171925004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51171925099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25585962519 + 25585962520.

It is an arithmetic number, because the mean of its divisors is an integer number (25585962520).

Almost surely, 2^51171925039 is an apocalyptic number.

51171925039 is a deficient number, since it is larger than the sum of its proper divisors (1).

51171925039 is an equidigital number, since it uses as much as digits as its factorization.

51171925039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 85050, while the sum is 43.

The spelling of 51171925039 in words is "fifty-one billion, one hundred seventy-one million, nine hundred twenty-five thousand, thirty-nine".