55331243 has 24 divisors (see below), whose sum is σ = 66227616. Its totient is φ = 45999360.

The previous prime is 55331197. The next prime is 55331251. The reversal of 55331243 is 34213355.

55331243 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 55331243 - 2⁶ = 55331179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55331293) 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 23 ways as a sum of consecutive naturals, for example, 75746 + ... + 76472.

It is an arithmetic number, because the mean of its divisors is an integer number (2759484).

Almost surely, 2^55331243 is an apocalyptic number.

55331243 is a deficient number, since it is larger than the sum of its proper divisors (10896373).

55331243 is a wasteful number, since it uses less digits than its factorization.

55331243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 803 (or 792 counting only the distinct ones).

The product of its digits is 5400, while the sum is 26.

The square root of 55331243 is about 7438.4973616988. The cubic root of 55331243 is about 381.0571739046.

Adding to 55331243 its reverse (34213355), we get a palindrome (89544598).

It can be divided in two parts, 553312 and 43, that added together give a palindrome (553355).

The spelling of 55331243 in words is "fifty-five million, three hundred thirty-one thousand, two hundred forty-three".