55005243 has 4 divisors (see below), whose sum is σ = 73340328. Its totient is φ = 36670160.

The previous prime is 55005241. The next prime is 55005263. The reversal of 55005243 is 34250055.

55005243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 55005243 - 2¹ = 55005241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55005241) 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 3 ways as a sum of consecutive naturals, for example, 9167538 + ... + 9167543.

It is an arithmetic number, because the mean of its divisors is an integer number (18335082).

Almost surely, 2^55005243 is an apocalyptic number.

55005243 is a deficient number, since it is larger than the sum of its proper divisors (18335085).

55005243 is a wasteful number, since it uses less digits than its factorization.

55005243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18335084.

The product of its (nonzero) digits is 3000, while the sum is 24.

The square root of 55005243 is about 7416.5519616598. The cubic root of 55005243 is about 380.3073298617.

Adding to 55005243 its reverse (34250055), we get a palindrome (89255298).

The spelling of 55005243 in words is "fifty-five million, five thousand, two hundred forty-three".