51517790327 has 4 divisors (see below), whose sum is σ = 52138486680. Its totient is φ = 50897093976.

The previous prime is 51517790323. The next prime is 51517790347. The reversal of 51517790327 is 72309771515.

It is a happy number.

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 51517790327 - 2² = 51517790323 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51517790323) 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, 310348052 + ... + 310348217.

It is an arithmetic number, because the mean of its divisors is an integer number (13034621670).

Almost surely, 2^51517790327 is an apocalyptic number.

51517790327 is a deficient number, since it is larger than the sum of its proper divisors (620696353).

51517790327 is an equidigital number, since it uses as much as digits as its factorization.

51517790327 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620696352.

The product of its (nonzero) digits is 463050, while the sum is 47.

The spelling of 51517790327 in words is "fifty-one billion, five hundred seventeen million, seven hundred ninety thousand, three hundred twenty-seven".