51122719239 has 8 divisors (see below), whose sum is σ = 68172803712. Its totient is φ = 34077223800.

The previous prime is 51122719213. The next prime is 51122719273. The reversal of 51122719239 is 93291722115.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51122719239 - 2⁷ = 51122719111 is a prime.

It is a super-2 number, since 2×51122719239² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51122719239.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51122719289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1121179 + ... + 1165884.

It is an arithmetic number, because the mean of its divisors is an integer number (8521600464).

Almost surely, 2^51122719239 is an apocalyptic number.

51122719239 is a deficient number, since it is larger than the sum of its proper divisors (17050084473).

51122719239 is a wasteful number, since it uses less digits than its factorization.

51122719239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2294517.

The product of its digits is 68040, while the sum is 42.

The spelling of 51122719239 in words is "fifty-one billion, one hundred twenty-two million, seven hundred nineteen thousand, two hundred thirty-nine".