51144547 has 4 divisors (see below), whose sum is σ = 51641200. Its totient is φ = 50647896.

The previous prime is 51144539. The next prime is 51144581. The reversal of 51144547 is 74544115.

51144547 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 is a cyclic number.

It is not a de Polignac number, because 51144547 - 2³ = 51144539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51144647) 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, 248172 + ... + 248377.

It is an arithmetic number, because the mean of its divisors is an integer number (12910300).

Almost surely, 2^51144547 is an apocalyptic number.

51144547 is a deficient number, since it is larger than the sum of its proper divisors (496653).

51144547 is a wasteful number, since it uses less digits than its factorization.

51144547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496652.

The product of its digits is 11200, while the sum is 31.

The square root of 51144547 is about 7151.5415820647. The cubic root of 51144547 is about 371.1930009572.

The spelling of 51144547 in words is "fifty-one million, one hundred forty-four thousand, five hundred forty-seven".