51319799 has 2 divisors, whose sum is σ = 51319800. Its totient is φ = 51319798.

The previous prime is 51319783. The next prime is 51319819. The reversal of 51319799 is 99791315.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51319799 - 2⁴ = 51319783 is a prime.

It is a Sophie Germain 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 (51319199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25659899 + 25659900.

It is an arithmetic number, because the mean of its divisors is an integer number (25659900).

Almost surely, 2^51319799 is an apocalyptic number.

51319799 is a deficient number, since it is larger than the sum of its proper divisors (1).

51319799 is an equidigital number, since it uses as much as digits as its factorization.

51319799 is an evil number, because the sum of its binary digits is even.

The product of its digits is 76545, while the sum is 44.

The square root of 51319799 is about 7163.7838465437. The cubic root of 51319799 is about 371.6164944865.

The spelling of 51319799 in words is "fifty-one million, three hundred nineteen thousand, seven hundred ninety-nine".