55243145 has 8 divisors (see below), whose sum is σ = 66699456. Its totient is φ = 43922736.

The previous prime is 55243117. The next prime is 55243151. The reversal of 55243145 is 54134255.

55243145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 55243145 - 2¹² = 55239049 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 33077 + ... + 34706.

It is an arithmetic number, because the mean of its divisors is an integer number (8337432).

Almost surely, 2^55243145 is an apocalyptic number.

It is an amenable number.

55243145 is a deficient number, since it is larger than the sum of its proper divisors (11456311).

55243145 is a wasteful number, since it uses less digits than its factorization.

55243145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67951.

The product of its digits is 12000, while the sum is 29.

The square root of 55243145 is about 7432.5732421551. The cubic root of 55243145 is about 380.8548276611.

The spelling of 55243145 in words is "fifty-five million, two hundred forty-three thousand, one hundred forty-five".