51916019 has 2 divisors, whose sum is σ = 51916020. Its totient is φ = 51916018.

The previous prime is 51915973. The next prime is 51916021. The reversal of 51916019 is 91061915.

It is a happy number.

51916019 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51916019 is a prime.

It is a super-2 number, since 2×51916019² = 5390546057616722, which contains 22 as substring.

Together with 51916021, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51916099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25958009 + 25958010.

It is an arithmetic number, because the mean of its divisors is an integer number (25958010).

Almost surely, 2^51916019 is an apocalyptic number.

51916019 is a deficient number, since it is larger than the sum of its proper divisors (1).

51916019 is an equidigital number, since it uses as much as digits as its factorization.

51916019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2430, while the sum is 32.

The square root of 51916019 is about 7205.2771633019. The cubic root of 51916019 is about 373.0500715029.

The spelling of 51916019 in words is "fifty-one million, nine hundred sixteen thousand, nineteen".