51189673 has 4 divisors (see below), whose sum is σ = 51210180. Its totient is φ = 51169168.

The previous prime is 51189659. The next prime is 51189683. The reversal of 51189673 is 37698115.

51189673 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.

It can be written as a sum of positive squares in 2 ways, for example, as 20187049 + 31002624 = 4493^2 + 5568^2 .

It is a cyclic number.

It is not a de Polignac number, because 51189673 - 2⁹ = 51189161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51189623) 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, 5890 + ... + 11707.

It is an arithmetic number, because the mean of its divisors is an integer number (12802545).

Almost surely, 2^51189673 is an apocalyptic number.

It is an amenable number.

51189673 is a deficient number, since it is larger than the sum of its proper divisors (20507).

51189673 is a wasteful number, since it uses less digits than its factorization.

51189673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20506.

The product of its digits is 45360, while the sum is 40.

The square root of 51189673 is about 7154.6958705454. The cubic root of 51189673 is about 371.3021395479.

The spelling of 51189673 in words is "fifty-one million, one hundred eighty-nine thousand, six hundred seventy-three".