51386911 has 2 divisors, whose sum is σ = 51386912. Its totient is φ = 51386910.

The previous prime is 51386873. The next prime is 51386917. The reversal of 51386911 is 11968315.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51386911 - 2¹⁵ = 51354143 is a prime.

It is a super-3 number, since 3×51386911³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51386917) 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, 25693455 + 25693456.

It is an arithmetic number, because the mean of its divisors is an integer number (25693456).

Almost surely, 2^51386911 is an apocalyptic number.

51386911 is a deficient number, since it is larger than the sum of its proper divisors (1).

51386911 is an equidigital number, since it uses as much as digits as its factorization.

51386911 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 34.

The square root of 51386911 is about 7168.4664329269. The cubic root of 51386911 is about 371.7784142073.

The spelling of 51386911 in words is "fifty-one million, three hundred eighty-six thousand, nine hundred eleven".