51287319 has 6 divisors (see below), whose sum is σ = 74081696. Its totient is φ = 34191540.

The previous prime is 51287281. The next prime is 51287329. The reversal of 51287319 is 91378215.

51287319 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51287319 - 2⁷ = 51287191 is a prime.

It is a super-2 number, since 2×51287319² = 5260778180415522, 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 (51287329) 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 5 ways as a sum of consecutive naturals, for example, 2849287 + ... + 2849304.

Almost surely, 2^51287319 is an apocalyptic number.

51287319 is a deficient number, since it is larger than the sum of its proper divisors (22794377).

51287319 is a wasteful number, since it uses less digits than its factorization.

51287319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5698597 (or 5698594 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The square root of 51287319 is about 7161.5165293393. The cubic root of 51287319 is about 371.5380799744.

The spelling of 51287319 in words is "fifty-one million, two hundred eighty-seven thousand, three hundred nineteen".