51211089 has 24 divisors (see below), whose sum is σ = 80605920. Its totient is φ = 32127552.

The previous prime is 51211081. The next prime is 51211109. The reversal of 51211089 is 98011215.

51211089 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51211089 - 2³ = 51211081 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (51211081) 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 23 ways as a sum of consecutive naturals, for example, 4522 + ... + 11084.

It is an arithmetic number, because the mean of its divisors is an integer number (3358580).

Almost surely, 2^51211089 is an apocalyptic number.

It is an amenable number.

51211089 is a deficient number, since it is larger than the sum of its proper divisors (29394831).

51211089 is a wasteful number, since it uses less digits than its factorization.

51211089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6606 (or 6583 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 27.

The square root of 51211089 is about 7156.1923534796. The cubic root of 51211089 is about 371.3539123469.

The spelling of 51211089 in words is "fifty-one million, two hundred eleven thousand, eighty-nine".