55441819 has 4 divisors (see below), whose sum is σ = 55499544. Its totient is φ = 55384096.

The previous prime is 55441817. The next prime is 55441843. The reversal of 55441819 is 91814455.

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 55441819 - 2¹ = 55441817 is a prime.

It is a super-2 number, since 2×55441819² = 6147590588057522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55441817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27397 + ... + 29350.

It is an arithmetic number, because the mean of its divisors is an integer number (13874886).

Almost surely, 2^55441819 is an apocalyptic number.

55441819 is a deficient number, since it is larger than the sum of its proper divisors (57725).

55441819 is an equidigital number, since it uses as much as digits as its factorization.

55441819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57724.

The product of its digits is 28800, while the sum is 37.

The square root of 55441819 is about 7445.9263359236. The cubic root of 55441819 is about 381.3108445756.

The spelling of 55441819 in words is "fifty-five million, four hundred forty-one thousand, eight hundred nineteen".