51106339939 has 2 divisors, whose sum is σ = 51106339940. Its totient is φ = 51106339938.

The previous prime is 51106339927. The next prime is 51106339969. The reversal of 51106339939 is 93993360115.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51106339939 - 2²⁵ = 51072785507 is a prime.

It is a super-2 number, since 2×51106339939² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51106339892 and 51106339901.

It is not a weakly prime, because it can be changed into another prime (51106339969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25553169969 + 25553169970.

It is an arithmetic number, because the mean of its divisors is an integer number (25553169970).

Almost surely, 2^51106339939 is an apocalyptic number.

51106339939 is a deficient number, since it is larger than the sum of its proper divisors (1).

51106339939 is an equidigital number, since it uses as much as digits as its factorization.

51106339939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 590490, while the sum is 49.

The spelling of 51106339939 in words is "fifty-one billion, one hundred six million, three hundred thirty-nine thousand, nine hundred thirty-nine".