51930313 has 4 divisors (see below), whose sum is σ = 53196948. Its totient is φ = 50663680.

The previous prime is 51930311. The next prime is 51930331. The reversal of 51930313 is 31303915.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31303915 = 5 ⋅6260783.

It can be written as a sum of positive squares in 2 ways, for example, as 7414729 + 44515584 = 2723^2 + 6672^2 .

It is a cyclic number.

It is not a de Polignac number, because 51930313 - 2¹ = 51930311 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51930311) 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 in 3 ways as a sum of consecutive naturals, for example, 633256 + ... + 633337.

It is an arithmetic number, because the mean of its divisors is an integer number (13299237).

Almost surely, 2^51930313 is an apocalyptic number.

It is an amenable number.

51930313 is a deficient number, since it is larger than the sum of its proper divisors (1266635).

51930313 is a wasteful number, since it uses less digits than its factorization.

51930313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1266634.

The product of its (nonzero) digits is 1215, while the sum is 25.

The square root of 51930313 is about 7206.2690069134. The cubic root of 51930313 is about 373.0843055634.

The spelling of 51930313 in words is "fifty-one million, nine hundred thirty thousand, three hundred thirteen".