51186719 has 2 divisors, whose sum is σ = 51186720. Its totient is φ = 51186718.

The previous prime is 51186697. The next prime is 51186731. The reversal of 51186719 is 91768115.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51186719 is a prime.

It is a super-2 number, since 2×51186719² = 5240160403969922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51186739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25593359 + 25593360.

It is an arithmetic number, because the mean of its divisors is an integer number (25593360).

Almost surely, 2^51186719 is an apocalyptic number.

51186719 is a deficient number, since it is larger than the sum of its proper divisors (1).

51186719 is an equidigital number, since it uses as much as digits as its factorization.

51186719 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15120, while the sum is 38.

The square root of 51186719 is about 7154.4894297217. The cubic root of 51186719 is about 371.2949971723.

The spelling of 51186719 in words is "fifty-one million, one hundred eighty-six thousand, seven hundred nineteen".