51000943727 has 4 divisors (see below), whose sum is σ = 51098834736. Its totient is φ = 50903052720.

The previous prime is 51000943709. The next prime is 51000943729. The reversal of 51000943727 is 72734900015.

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 51000943727 - 2⁸ = 51000943471 is a prime.

It is a super-2 number, since 2×51000943727² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51000943729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48944723 + ... + 48945764.

It is an arithmetic number, because the mean of its divisors is an integer number (12774708684).

Almost surely, 2^51000943727 is an apocalyptic number.

51000943727 is a deficient number, since it is larger than the sum of its proper divisors (97891009).

51000943727 is an equidigital number, since it uses as much as digits as its factorization.

51000943727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97891008.

The product of its (nonzero) digits is 52920, while the sum is 38.

The spelling of 51000943727 in words is "fifty-one billion, nine hundred forty-three thousand, seven hundred twenty-seven".