51330689 has 4 divisors (see below), whose sum is σ = 51372720. Its totient is φ = 51288660.

The previous prime is 51330683. The next prime is 51330739. The reversal of 51330689 is 98603315.

51330689 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51330689 - 2¹⁶ = 51265153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51330683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19127 + ... + 21644.

It is an arithmetic number, because the mean of its divisors is an integer number (12843180).

Almost surely, 2^51330689 is an apocalyptic number.

It is an amenable number.

51330689 is a deficient number, since it is larger than the sum of its proper divisors (42031).

51330689 is a wasteful number, since it uses less digits than its factorization.

51330689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42030.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 51330689 is about 7164.5438794106. The cubic root of 51330689 is about 371.6427781528.

The spelling of 51330689 in words is "fifty-one million, three hundred thirty thousand, six hundred eighty-nine".