51995719 has 2 divisors, whose sum is σ = 51995720. Its totient is φ = 51995718.

The previous prime is 51995717. The next prime is 51995737. The reversal of 51995719 is 91759915.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51995719 - 2¹ = 51995717 is a prime.

It is a super-2 number, since 2×51995719² = 5407109588653922, which contains 22 as substring.

Together with 51995717, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51995717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25997859 + 25997860.

It is an arithmetic number, because the mean of its divisors is an integer number (25997860).

Almost surely, 2^51995719 is an apocalyptic number.

51995719 is a deficient number, since it is larger than the sum of its proper divisors (1).

51995719 is an equidigital number, since it uses as much as digits as its factorization.

51995719 is an evil number, because the sum of its binary digits is even.

The product of its digits is 127575, while the sum is 46.

The square root of 51995719 is about 7210.8057108759. The cubic root of 51995719 is about 373.2408725287.

The spelling of 51995719 in words is "fifty-one million, nine hundred ninety-five thousand, seven hundred nineteen".