51445443 has 24 divisors (see below), whose sum is σ = 80151120. Its totient is φ = 29265600.

The previous prime is 51445439. The next prime is 51445477. The reversal of 51445443 is 34454415.

It is not a de Polignac number, because 51445443 - 2² = 51445439 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51445443.

It is not an unprimeable number, because it can be changed into a prime (51445423) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38893 + ... + 40193.

It is an arithmetic number, because the mean of its divisors is an integer number (3339630).

Almost surely, 2^51445443 is an apocalyptic number.

51445443 is a deficient number, since it is larger than the sum of its proper divisors (28705677).

51445443 is a wasteful number, since it uses less digits than its factorization.

51445443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1587 (or 1580 counting only the distinct ones).

The product of its digits is 19200, while the sum is 30.

The square root of 51445443 is about 7172.5478736639. The cubic root of 51445443 is about 371.9195180845.

Adding to 51445443 its reverse (34454415), we get a palindrome (85899858).

The spelling of 51445443 in words is "fifty-one million, four hundred forty-five thousand, four hundred forty-three".