51500313 has 16 divisors (see below), whose sum is σ = 76699840. Its totient is φ = 34152192.

The previous prime is 51500303. The next prime is 51500357. The reversal of 51500313 is 31300515.

It is a happy number.

It is not a de Polignac number, because 51500313 - 2⁹ = 51499801 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51500303) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 270 + ... + 10152.

It is an arithmetic number, because the mean of its divisors is an integer number (4793740).

Almost surely, 2^51500313 is an apocalyptic number.

It is an amenable number.

51500313 is a deficient number, since it is larger than the sum of its proper divisors (25199527).

51500313 is a wasteful number, since it uses less digits than its factorization.

51500313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10085 (or 10079 counting only the distinct ones).

The product of its (nonzero) digits is 225, while the sum is 18.

The square root of 51500313 is about 7176.3718549139. The cubic root of 51500313 is about 372.0516967696.

Adding to 51500313 its reverse (31300515), we get a palindrome (82800828).

The spelling of 51500313 in words is "fifty-one million, five hundred thousand, three hundred thirteen".