51324331 has 4 divisors (see below), whose sum is σ = 51338664. Its totient is φ = 51310000.

The previous prime is 51324323. The next prime is 51324347. The reversal of 51324331 is 13342315.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 51324331 - 2³ = 51324323 is a prime.

It is a super-2 number, since 2×51324331² = 5268373905195122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51324311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3336 + ... + 10666.

It is an arithmetic number, because the mean of its divisors is an integer number (12834666).

Almost surely, 2^51324331 is an apocalyptic number.

51324331 is a deficient number, since it is larger than the sum of its proper divisors (14333).

51324331 is an equidigital number, since it uses as much as digits as its factorization.

51324331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14332.

The product of its digits is 1080, while the sum is 22.

The square root of 51324331 is about 7164.1001528454. The cubic root of 51324331 is about 371.6274331912.

Adding to 51324331 its reverse (13342315), we get a palindrome (64666646).

The spelling of 51324331 in words is "fifty-one million, three hundred twenty-four thousand, three hundred thirty-one".