51304399 has 2 divisors, whose sum is σ = 51304400. Its totient is φ = 51304398.

The previous prime is 51304397. The next prime is 51304423. The reversal of 51304399 is 99340315.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51304399 - 2¹ = 51304397 is a prime.

Together with 51304397, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51304397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25652199 + 25652200.

It is an arithmetic number, because the mean of its divisors is an integer number (25652200).

Almost surely, 2^51304399 is an apocalyptic number.

51304399 is a deficient number, since it is larger than the sum of its proper divisors (1).

51304399 is an equidigital number, since it uses as much as digits as its factorization.

51304399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14580, while the sum is 34.

The square root of 51304399 is about 7162.7089149288. The cubic root of 51304399 is about 371.5793193178.

The spelling of 51304399 in words is "fifty-one million, three hundred four thousand, three hundred ninety-nine".