51320313 has 12 divisors (see below), whose sum is σ = 80868528. Its totient is φ = 31103160.

The previous prime is 51320299. The next prime is 51320323. The reversal of 51320313 is 31302315.

It is not a de Polignac number, because 51320313 - 2⁵ = 51320281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51320323) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 259095 + ... + 259292.

It is an arithmetic number, because the mean of its divisors is an integer number (6739044).

Almost surely, 2^51320313 is an apocalyptic number.

It is an amenable number.

51320313 is a deficient number, since it is larger than the sum of its proper divisors (29548215).

51320313 is a wasteful number, since it uses less digits than its factorization.

51320313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518404 (or 518401 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 18.

The square root of 51320313 is about 7163.8197213498. The cubic root of 51320313 is about 371.6177351398.

Adding to 51320313 its reverse (31302315), we get a palindrome (82622628).

The spelling of 51320313 in words is "fifty-one million, three hundred twenty thousand, three hundred thirteen".