51605089 has 4 divisors (see below), whose sum is σ = 51819460. Its totient is φ = 51390720.

The previous prime is 51605063. The next prime is 51605131. The reversal of 51605089 is 98050615.

51605089 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 16000000 + 35605089 = 4000^2 + 5967^2 .

It is a cyclic number.

It is not a de Polignac number, because 51605089 - 2⁹ = 51604577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51605009) 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, 106824 + ... + 107305.

It is an arithmetic number, because the mean of its divisors is an integer number (12954865).

Almost surely, 2^51605089 is an apocalyptic number.

It is an amenable number.

51605089 is a deficient number, since it is larger than the sum of its proper divisors (214371).

51605089 is a wasteful number, since it uses less digits than its factorization.

51605089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214370.

The product of its (nonzero) digits is 10800, while the sum is 34.

The square root of 51605089 is about 7183.6682133851. The cubic root of 51605089 is about 372.3038355764.

The spelling of 51605089 in words is "fifty-one million, six hundred five thousand, eighty-nine".