51330331 has 4 divisors (see below), whose sum is σ = 55278832. Its totient is φ = 47381832.

The previous prime is 51330317. The next prime is 51330379. The reversal of 51330331 is 13303315.

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 51330331 - 2⁵ = 51330299 is a prime.

It is a super-2 number, since 2×51330331² = 5269605761139122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51330299 and 51330308.

It is not an unprimeable number, because it can be changed into a prime (51330031) 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, 1974231 + ... + 1974256.

It is an arithmetic number, because the mean of its divisors is an integer number (13819708).

Almost surely, 2^51330331 is an apocalyptic number.

51330331 is a deficient number, since it is larger than the sum of its proper divisors (3948501).

51330331 is a wasteful number, since it uses less digits than its factorization.

51330331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3948500.

The product of its (nonzero) digits is 405, while the sum is 19.

The square root of 51330331 is about 7164.5188952225. The cubic root of 51330331 is about 371.6419141574.

Adding to 51330331 its reverse (13303315), we get a palindrome (64633646).

The spelling of 51330331 in words is "fifty-one million, three hundred thirty thousand, three hundred thirty-one".