51510440339 has 4 divisors (see below), whose sum is σ = 51511357824. Its totient is φ = 51509522856.

The previous prime is 51510440309. The next prime is 51510440341. The reversal of 51510440339 is 93304401515.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51510440339 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51510440299 and 51510440308.

It is not an unprimeable number, because it can be changed into a prime (51510440309) 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, 368627 + ... + 488780.

It is an arithmetic number, because the mean of its divisors is an integer number (12877839456).

Almost surely, 2^51510440339 is an apocalyptic number.

51510440339 is a deficient number, since it is larger than the sum of its proper divisors (917485).

51510440339 is an equidigital number, since it uses as much as digits as its factorization.

51510440339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 917484.

The product of its (nonzero) digits is 32400, while the sum is 35.

The spelling of 51510440339 in words is "fifty-one billion, five hundred ten million, four hundred forty thousand, three hundred thirty-nine".