55442205 has 64 divisors (see below), whose sum is σ = 121336320. Its totient is φ = 23390208.

The previous prime is 55442203. The next prime is 55442239. The reversal of 55442205 is 50224455.

It is not a de Polignac number, because 55442205 - 2¹ = 55442203 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55442203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10029 + ... + 14541.

It is an arithmetic number, because the mean of its divisors is an integer number (1895880).

Almost surely, 2^55442205 is an apocalyptic number.

It is an amenable number.

55442205 is an abundant number, since it is smaller than the sum of its proper divisors (65894115).

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

55442205 is a wasteful number, since it uses less digits than its factorization.

55442205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4547 (or 4541 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 27.

The square root of 55442205 is about 7445.9522560919. The cubic root of 55442205 is about 381.3117295012.

The spelling of 55442205 in words is "fifty-five million, four hundred forty-two thousand, two hundred five".