55440112 has 120 divisors (see below), whose sum is σ = 138875040. Its totient is φ = 20966400.

The previous prime is 55440079. The next prime is 55440139. The reversal of 55440112 is 21104455.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 548862 + ... + 548962.

It is an arithmetic number, because the mean of its divisors is an integer number (1157292).

Almost surely, 2^55440112 is an apocalyptic number.

55440112 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55440112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69437520).

55440112 is an abundant number, since it is smaller than the sum of its proper divisors (83434928).

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

55440112 is a wasteful number, since it uses less digits than its factorization.

55440112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171 (or 152 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 55440112 is about 7445.8117086050. The cubic root of 55440112 is about 381.3069311381.

Adding to 55440112 its reverse (21104455), we get a palindrome (76544567).

The spelling of 55440112 in words is "fifty-five million, four hundred forty thousand, one hundred twelve".