51330839 has 8 divisors (see below), whose sum is σ = 59323680. Its totient is φ = 43502976.

The previous prime is 51330821. The next prime is 51330847. The reversal of 51330839 is 93803315.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51330839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51330889) 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, 40574 + ... + 41819.

It is an arithmetic number, because the mean of its divisors is an integer number (7415460).

Almost surely, 2^51330839 is an apocalyptic number.

51330839 is a deficient number, since it is larger than the sum of its proper divisors (7992841).

51330839 is an equidigital number, since it uses as much as digits as its factorization.

51330839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82489.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 51330839 is about 7164.5543476200. The cubic root of 51330839 is about 371.6431401608.

The spelling of 51330839 in words is "fifty-one million, three hundred thirty thousand, eight hundred thirty-nine".