55442185 has 8 divisors (see below), whose sum is σ = 70444296. Its totient is φ = 41744640.

The previous prime is 55442147. The next prime is 55442197. The reversal of 55442185 is 58124455.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 6610041 + 48832144 = 2571^2 + 6988^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55442185 - 2¹⁹ = 54917897 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55442185.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 326046 + ... + 326215.

It is an arithmetic number, because the mean of its divisors is an integer number (8805537).

Almost surely, 2^55442185 is an apocalyptic number.

It is an amenable number.

55442185 is a deficient number, since it is larger than the sum of its proper divisors (15002111).

55442185 is a wasteful number, since it uses less digits than its factorization.

55442185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652283.

The product of its digits is 32000, while the sum is 34.

The square root of 55442185 is about 7445.9509130802. The cubic root of 55442185 is about 381.3116836502.

The spelling of 55442185 in words is "fifty-five million, four hundred forty-two thousand, one hundred eighty-five".