51116519 has 4 divisors (see below), whose sum is σ = 51180360. Its totient is φ = 51052680.

The previous prime is 51116509. The next prime is 51116561. The reversal of 51116519 is 91561115.

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 51116519 - 2⁴ = 51116503 is a prime.

It is a super-2 number, since 2×51116519² = 5225797029354722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51116491 and 51116500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51116509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30704 + ... + 32325.

It is an arithmetic number, because the mean of its divisors is an integer number (12795090).

Almost surely, 2^51116519 is an apocalyptic number.

51116519 is a deficient number, since it is larger than the sum of its proper divisors (63841).

51116519 is an equidigital number, since it uses as much as digits as its factorization.

51116519 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63840.

The product of its digits is 1350, while the sum is 29.

The square root of 51116519 is about 7149.5817360178. The cubic root of 51116519 is about 371.1251820720.

The spelling of 51116519 in words is "fifty-one million, one hundred sixteen thousand, five hundred nineteen".