55105443 has 24 divisors (see below), whose sum is σ = 81768960. Its totient is φ = 35748720.

The previous prime is 55105441. The next prime is 55105451. The reversal of 55105443 is 34450155.

It is not a de Polignac number, because 55105443 - 2¹ = 55105441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55105441) 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, 52518 + ... + 53556.

It is an arithmetic number, because the mean of its divisors is an integer number (3407040).

Almost surely, 2^55105443 is an apocalyptic number.

55105443 is a deficient number, since it is larger than the sum of its proper divisors (26663517).

55105443 is a wasteful number, since it uses less digits than its factorization.

55105443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1199 (or 1196 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 55105443 is about 7423.3040487373. The cubic root of 55105443 is about 380.5381180360.

Adding to 55105443 its reverse (34450155), we get a palindrome (89555598).

The spelling of 55105443 in words is "fifty-five million, one hundred five thousand, four hundred forty-three".