51115323 has 8 divisors (see below), whose sum is σ = 77890048. Its totient is φ = 29208744.

The previous prime is 51115297. The next prime is 51115327. The reversal of 51115323 is 32351115.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51115323 - 2¹⁰ = 51114299 is a prime.

It is a super-2 number, since 2×51115323² = 5225552490788658, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 2434063 = 51115323 / (5 + 1 + 1 + 1 + 5 + 3 + 2 + 3).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51115323.

It is not an unprimeable number, because it can be changed into a prime (51115327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1217011 + ... + 1217052.

It is an arithmetic number, because the mean of its divisors is an integer number (9736256).

Almost surely, 2^51115323 is an apocalyptic number.

51115323 is a deficient number, since it is larger than the sum of its proper divisors (26774725).

51115323 is a wasteful number, since it uses less digits than its factorization.

51115323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2434073.

The product of its digits is 450, while the sum is 21.

The square root of 51115323 is about 7149.4980942721. The cubic root of 51115323 is about 371.1222875793.

Adding to 51115323 its reverse (32351115), we get a palindrome (83466438).

The spelling of 51115323 in words is "fifty-one million, one hundred fifteen thousand, three hundred twenty-three".