55444443 has 16 divisors (see below), whose sum is σ = 76638720. Its totient is φ = 35630496.

The previous prime is 55444439. The next prime is 55444457. The reversal of 55444443 is 34444455.

It is a happy number.

It is not a de Polignac number, because 55444443 - 2² = 55444439 is a prime.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (55444343) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6513 + ... + 12381.

It is an arithmetic number, because the mean of its divisors is an integer number (4789920).

Almost surely, 2^55444443 is an apocalyptic number.

55444443 is a deficient number, since it is larger than the sum of its proper divisors (21194277).

55444443 is a wasteful number, since it uses less digits than its factorization.

55444443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5986.

The product of its digits is 76800, while the sum is 33.

The square root of 55444443 is about 7446.1025375696. The cubic root of 55444443 is about 381.3168601543.

Adding to 55444443 its reverse (34444455), we get a palindrome (89888898).

The spelling of 55444443 in words is "fifty-five million, four hundred forty-four thousand, four hundred forty-three".