51609323 has 4 divisors (see below), whose sum is σ = 51627048. Its totient is φ = 51591600.

The previous prime is 51609289. The next prime is 51609329. The reversal of 51609323 is 32390615.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51609323 - 2¹² = 51605227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51609329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3353 + ... + 10698.

It is an arithmetic number, because the mean of its divisors is an integer number (12906762).

Almost surely, 2^51609323 is an apocalyptic number.

51609323 is a deficient number, since it is larger than the sum of its proper divisors (17725).

51609323 is a wasteful number, since it uses less digits than its factorization.

51609323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17724.

The product of its (nonzero) digits is 4860, while the sum is 29.

The square root of 51609323 is about 7183.9629035791. The cubic root of 51609323 is about 372.3140173328.

Adding to 51609323 its reverse (32390615), we get a palindrome (83999938).

The spelling of 51609323 in words is "fifty-one million, six hundred nine thousand, three hundred twenty-three".