51339313499 has 4 divisors (see below), whose sum is σ = 51683872800. Its totient is φ = 50994754200.

The previous prime is 51339313471. The next prime is 51339313547. The reversal of 51339313499 is 99431393315.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51339313499 - 2⁸ = 51339313243 is a prime.

It is a super-2 number, since 2×51339313499² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51339313469) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 172279427 + ... + 172279724.

It is an arithmetic number, because the mean of its divisors is an integer number (12920968200).

Almost surely, 2^51339313499 is an apocalyptic number.

51339313499 is a deficient number, since it is larger than the sum of its proper divisors (344559301).

51339313499 is a wasteful number, since it uses less digits than its factorization.

51339313499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344559300.

The product of its digits is 1180980, while the sum is 50.

The spelling of 51339313499 in words is "fifty-one billion, three hundred thirty-nine million, three hundred thirteen thousand, four hundred ninety-nine".