51086123738239 has 2 divisors, whose sum is σ = 51086123738240. Its totient is φ = 51086123738238.

The previous prime is 51086123738231. The next prime is 51086123738281. The reversal of 51086123738239 is 93283732168015.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51086123738239 - 2³ = 51086123738231 is a prime.

It is a super-2 number, since 2×51086123738239² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51086123738231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25543061869119 + 25543061869120.

It is an arithmetic number, because the mean of its divisors is an integer number (25543061869120).

Almost surely, 2^{51086123738239} is an apocalyptic number.

51086123738239 is a deficient number, since it is larger than the sum of its proper divisors (1).

51086123738239 is an equidigital number, since it uses as much as digits as its factorization.

51086123738239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13063680, while the sum is 58.

The spelling of 51086123738239 in words is "fifty-one trillion, eighty-six billion, one hundred twenty-three million, seven hundred thirty-eight thousand, two hundred thirty-nine".