51513323 has 4 divisors (see below), whose sum is σ = 51859200. Its totient is φ = 51167448.

The previous prime is 51513299. The next prime is 51513347. The reversal of 51513323 is 32331515.

51513323 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32331515 = 5 ⋅6466303.

It is an interprime number because it is at equal distance from previous prime (51513299) and next prime (51513347).

It is a cyclic number.

It is not a de Polignac number, because 51513323 - 2⁸ = 51513067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51513373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 172715 + ... + 173012.

It is an arithmetic number, because the mean of its divisors is an integer number (12964800).

Almost surely, 2^51513323 is an apocalyptic number.

51513323 is a deficient number, since it is larger than the sum of its proper divisors (345877).

51513323 is a wasteful number, since it uses less digits than its factorization.

51513323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345876.

The product of its digits is 1350, while the sum is 23.

The square root of 51513323 is about 7177.2782445715. The cubic root of 51513323 is about 372.0830233432.

Adding to 51513323 its reverse (32331515), we get a palindrome (83844838).

The spelling of 51513323 in words is "fifty-one million, five hundred thirteen thousand, three hundred twenty-three".