51547889 has 4 divisors (see below), whose sum is σ = 51617280. Its totient is φ = 51478500.

The previous prime is 51547879. The next prime is 51547901. The reversal of 51547889 is 98874515.

51547889 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-51547889 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51547879) 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, 33569 + ... + 35070.

It is an arithmetic number, because the mean of its divisors is an integer number (12904320).

Almost surely, 2^51547889 is an apocalyptic number.

It is an amenable number.

51547889 is a deficient number, since it is larger than the sum of its proper divisors (69391).

51547889 is an equidigital number, since it uses as much as digits as its factorization.

51547889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69390.

The product of its digits is 403200, while the sum is 47.

The square root of 51547889 is about 7179.6858566375. The cubic root of 51547889 is about 372.1662286539.

The spelling of 51547889 in words is "fifty-one million, five hundred forty-seven thousand, eight hundred eighty-nine".