51500953139 has 8 divisors (see below), whose sum is σ = 55960289280. Its totient is φ = 47216493000.

The previous prime is 51500953109. The next prime is 51500953159. The reversal of 51500953139 is 93135900515.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51500953139 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51500953096 and 51500953105.

It is not an unprimeable number, because it can be changed into a prime (51500953109) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43718387 + ... + 43719564.

It is an arithmetic number, because the mean of its divisors is an integer number (6995036160).

Almost surely, 2^51500953139 is an apocalyptic number.

51500953139 is a deficient number, since it is larger than the sum of its proper divisors (4459336141).

51500953139 is a wasteful number, since it uses less digits than its factorization.

51500953139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87438001.

The product of its (nonzero) digits is 91125, while the sum is 41.

The spelling of 51500953139 in words is "fifty-one billion, five hundred million, nine hundred fifty-three thousand, one hundred thirty-nine".