51445841 has 4 divisors (see below), whose sum is σ = 51461184. Its totient is φ = 51430500.

The previous prime is 51445837. The next prime is 51445847. The reversal of 51445841 is 14854415.

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 not a de Polignac number, because 51445841 - 2² = 51445837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51445798 and 51445807.

It is not an unprimeable number, because it can be changed into a prime (51445847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 245 + ... + 10146.

It is an arithmetic number, because the mean of its divisors is an integer number (12865296).

Almost surely, 2^51445841 is an apocalyptic number.

It is an amenable number.

51445841 is a deficient number, since it is larger than the sum of its proper divisors (15343).

51445841 is a wasteful number, since it uses less digits than its factorization.

51445841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15342.

The product of its digits is 12800, while the sum is 32.

The square root of 51445841 is about 7172.5756182839. The cubic root of 51445841 is about 371.9204771820.

The spelling of 51445841 in words is "fifty-one million, four hundred forty-five thousand, eight hundred forty-one".