55055405 has 4 divisors (see below), whose sum is σ = 66066492. Its totient is φ = 44044320.

The previous prime is 55055387. The next prime is 55055417. The reversal of 55055405 is 50455055.

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

It can be written as a sum of positive squares in 2 ways, for example, as 26357956 + 28697449 = 5134^2 + 5357^2 .

It is not a de Polignac number, because 55055405 - 2²² = 50861101 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, 5505536 + ... + 5505545.

It is an arithmetic number, because the mean of its divisors is an integer number (16516623).

Almost surely, 2^55055405 is an apocalyptic number.

It is an amenable number.

55055405 is a deficient number, since it is larger than the sum of its proper divisors (11011087).

55055405 is a wasteful number, since it uses less digits than its factorization.

55055405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11011086.

The product of its (nonzero) digits is 12500, while the sum is 29.

The square root of 55055405 is about 7419.9329511795. The cubic root of 55055405 is about 380.4229017545.

It can be divided in two parts, 550 and 55405, that added together give a palindrome (55955).

The spelling of 55055405 in words is "fifty-five million, fifty-five thousand, four hundred five".