51089189 has 4 divisors (see below), whose sum is σ = 51427680. Its totient is φ = 50750700.

The previous prime is 51089167. The next prime is 51089201. The reversal of 51089189 is 98198015.

51089189 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 a de Polignac number, because none of the positive numbers 2^k-51089189 is a prime.

It is a super-2 number, since 2×51089189² = 5220210465355442, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51089789) 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, 169019 + ... + 169320.

It is an arithmetic number, because the mean of its divisors is an integer number (12856920).

Almost surely, 2^51089189 is an apocalyptic number.

It is an amenable number.

51089189 is a deficient number, since it is larger than the sum of its proper divisors (338491).

51089189 is a wasteful number, since it uses less digits than its factorization.

51089189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338490.

The product of its (nonzero) digits is 25920, while the sum is 41.

The square root of 51089189 is about 7147.6701798558. The cubic root of 51089189 is about 371.0590282492.

The spelling of 51089189 in words is "fifty-one million, eighty-nine thousand, one hundred eighty-nine".