51376399 has 4 divisors (see below), whose sum is σ = 54080440. Its totient is φ = 48672360.

The previous prime is 51376373. The next prime is 51376417. The reversal of 51376399 is 99367315.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51376399 - 2¹⁵ = 51343631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51376349) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1351992 + ... + 1352029.

It is an arithmetic number, because the mean of its divisors is an integer number (13520110).

Almost surely, 2^51376399 is an apocalyptic number.

51376399 is a deficient number, since it is larger than the sum of its proper divisors (2704041).

51376399 is a wasteful number, since it uses less digits than its factorization.

51376399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2704040.

The product of its digits is 153090, while the sum is 43.

The square root of 51376399 is about 7167.7331842082. The cubic root of 51376399 is about 371.7530614399.

The spelling of 51376399 in words is "fifty-one million, three hundred seventy-six thousand, three hundred ninety-nine".