51444145 has 8 divisors (see below), whose sum is σ = 62090856. Its totient is φ = 40916736.

The previous prime is 51444143. The next prime is 51444157. The reversal of 51444145 is 54144415.

51444145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 19079424 + 32364721 = 4368^2 + 5689^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51444145 - 2¹ = 51444143 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51444143) 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 7 ways as a sum of consecutive naturals, for example, 28872 + ... + 30601.

It is an arithmetic number, because the mean of its divisors is an integer number (7761357).

Almost surely, 2^51444145 is an apocalyptic number.

It is an amenable number.

51444145 is a deficient number, since it is larger than the sum of its proper divisors (10646711).

51444145 is a wasteful number, since it uses less digits than its factorization.

51444145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59651.

The product of its digits is 6400, while the sum is 28.

The square root of 51444145 is about 7172.4573892077. The cubic root of 51444145 is about 371.9163901392.

It can be divided in two parts, 5 and 1444145, that added together give a triangular number (1444150 = T₁₆₉₉).

The spelling of 51444145 in words is "fifty-one million, four hundred forty-four thousand, one hundred forty-five".