51911719 has 2 divisors, whose sum is σ = 51911720. Its totient is φ = 51911718.

The previous prime is 51911663. The next prime is 51911747. The reversal of 51911719 is 91711915.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51911719 is a prime.

It is a super-2 number, since 2×51911719² = 5389653139069922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51911219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25955859 + 25955860.

It is an arithmetic number, because the mean of its divisors is an integer number (25955860).

Almost surely, 2^51911719 is an apocalyptic number.

51911719 is a deficient number, since it is larger than the sum of its proper divisors (1).

51911719 is an equidigital number, since it uses as much as digits as its factorization.

51911719 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2835, while the sum is 34.

The square root of 51911719 is about 7204.9787647154. The cubic root of 51911719 is about 373.0397717943.

The spelling of 51911719 in words is "fifty-one million, nine hundred eleven thousand, seven hundred nineteen".