51591319 has 16 divisors (see below), whose sum is σ = 57798720. Its totient is φ = 45722880.

The previous prime is 51591317. The next prime is 51591343. The reversal of 51591319 is 91319515.

51591319 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 51591319 - 2¹ = 51591317 is a prime.

It is a super-2 number, since 2×51591319² = 5323328392319522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51591317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105694 + ... + 106180.

It is an arithmetic number, because the mean of its divisors is an integer number (3612420).

Almost surely, 2^51591319 is an apocalyptic number.

51591319 is a deficient number, since it is larger than the sum of its proper divisors (6207401).

51591319 is a wasteful number, since it uses less digits than its factorization.

51591319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 810.

The product of its digits is 6075, while the sum is 34.

The square root of 51591319 is about 7182.7097254448. The cubic root of 51591319 is about 372.2707181716.

The spelling of 51591319 in words is "fifty-one million, five hundred ninety-one thousand, three hundred nineteen".