51113719 has 2 divisors, whose sum is σ = 51113720. Its totient is φ = 51113718.

The previous prime is 51113717. The next prime is 51113723. The reversal of 51113719 is 91731115.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51113719 - 2¹ = 51113717 is a prime.

It is a super-2 number, since 2×51113719² = 5225224540021922, which contains 22 as substring.

Together with 51113717, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_3063871 and since 51113719 and 3063871 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51113717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25556859 + 25556860.

It is an arithmetic number, because the mean of its divisors is an integer number (25556860).

Almost surely, 2^51113719 is an apocalyptic number.

51113719 is a deficient number, since it is larger than the sum of its proper divisors (1).

51113719 is an equidigital number, since it uses as much as digits as its factorization.

51113719 is an evil number, because the sum of its binary digits is even.

The product of its digits is 945, while the sum is 28.

The square root of 51113719 is about 7149.3859176855. The cubic root of 51113719 is about 371.1184055967.

The spelling of 51113719 in words is "fifty-one million, one hundred thirteen thousand, seven hundred nineteen".