55805445 has 24 divisors (see below), whose sum is σ = 98373600. Its totient is φ = 29257056.

The previous prime is 55805419. The next prime is 55805447. The reversal of 55805445 is 54450855.

It is not a de Polignac number, because 55805445 - 2⁶ = 55805381 is a prime.

It is a super-2 number, since 2×55805445² = 6228495383296050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55805447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7855 + ... + 13164.

It is an arithmetic number, because the mean of its divisors is an integer number (4098900).

Almost surely, 2^55805445 is an apocalyptic number.

It is an amenable number.

55805445 is a deficient number, since it is larger than the sum of its proper divisors (42568155).

55805445 is a wasteful number, since it uses less digits than its factorization.

55805445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21089 (or 21086 counting only the distinct ones).

The product of its (nonzero) digits is 80000, while the sum is 36.

The square root of 55805445 is about 7470.3042106731. The cubic root of 55805445 is about 382.1426625572.

It can be divided in two parts, 5580 and 5445, that added together give a square (11025 = 105²).

The spelling of 55805445 in words is "fifty-five million, eight hundred five thousand, four hundred forty-five".