100440055 has 4 divisors (see below), whose sum is σ = 120528072. Its totient is φ = 80352040.

The previous prime is 100440049. The next prime is 100440071. The reversal of 100440055 is 550044001.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 100440055 - 2¹¹ = 100438007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10044001 + ... + 10044010.

It is an arithmetic number, because the mean of its divisors is an integer number (30132018).

Almost surely, 2^100440055 is an apocalyptic number.

100440055 is a deficient number, since it is larger than the sum of its proper divisors (20088017).

100440055 is an equidigital number, since it uses as much as digits as its factorization.

100440055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20088016.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 100440055 is about 10021.9785970636. The cubic root of 100440055 is about 464.8387385468.

Adding to 100440055 its reverse (550044001), we get a palindrome (650484056).

The spelling of 100440055 in words is "one hundred million, four hundred forty thousand, fifty-five".