55558243 has 12 divisors (see below), whose sum is σ = 60370968. Its totient is φ = 51105600.

The previous prime is 55558241. The next prime is 55558249. The reversal of 55558243 is 34285555.

It is a happy number.

55558243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55558243 - 2¹ = 55558241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55558241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 92143 + ... + 92743.

It is an arithmetic number, because the mean of its divisors is an integer number (5030914).

Almost surely, 2^55558243 is an apocalyptic number.

55558243 is a deficient number, since it is larger than the sum of its proper divisors (4812725).

55558243 is a wasteful number, since it uses less digits than its factorization.

55558243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1174 (or 1161 counting only the distinct ones).

The product of its digits is 120000, while the sum is 37.

The square root of 55558243 is about 7453.7402020731. The cubic root of 55558243 is about 381.5775667971.

The spelling of 55558243 in words is "fifty-five million, five hundred fifty-eight thousand, two hundred forty-three".