51323399 has 2 divisors, whose sum is σ = 51323400. Its totient is φ = 51323398.

The previous prime is 51323353. The next prime is 51323423. The reversal of 51323399 is 99332315.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51323399 - 2¹⁶ = 51257863 is a prime.

It is a Chen prime.

It is a plaindrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51323309) 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, 25661699 + 25661700.

It is an arithmetic number, because the mean of its divisors is an integer number (25661700).

Almost surely, 2^51323399 is an apocalyptic number.

51323399 is a deficient number, since it is larger than the sum of its proper divisors (1).

51323399 is an equidigital number, since it uses as much as digits as its factorization.

51323399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21870, while the sum is 35.

The square root of 51323399 is about 7164.0351060000. The cubic root of 51323399 is about 371.6251837132.

The spelling of 51323399 in words is "fifty-one million, three hundred twenty-three thousand, three hundred ninety-nine".