55109444 has 48 divisors (see below), whose sum is σ = 113573376. Its totient is φ = 23155200.

The previous prime is 55109441. The next prime is 55109477. The reversal of 55109444 is 44490155.

It is a self number, because there is not a number n which added to its sum of digits gives 55109444.

It is not an unprimeable number, because it can be changed into a prime (55109441) 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, 26399 + ... + 28409.

It is an arithmetic number, because the mean of its divisors is an integer number (2366112).

Almost surely, 2^55109444 is an apocalyptic number.

It is an amenable number.

55109444 is an abundant number, since it is smaller than the sum of its proper divisors (58463932).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55109444 is a wasteful number, since it uses less digits than its factorization.

55109444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2076 (or 2074 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 55109444 is about 7423.5735330096. The cubic root of 55109444 is about 380.5473276294.

Adding to 55109444 its reverse (44490155), we get a palindrome (99599599).

The spelling of 55109444 in words is "fifty-five million, one hundred nine thousand, four hundred forty-four".