55312243 has 12 divisors (see below), whose sum is σ = 63830032. Its totient is φ = 46952640.

The previous prime is 55312189. The next prime is 55312267. The reversal of 55312243 is 34221355.

It is not a de Polignac number, because 55312243 - 2²¹ = 53215091 is a prime.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (55312273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 131173 + ... + 131593.

Almost surely, 2^55312243 is an apocalyptic number.

55312243 is a deficient number, since it is larger than the sum of its proper divisors (8517789).

55312243 is an equidigital number, since it uses as much as digits as its factorization.

55312243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 702 (or 565 counting only the distinct ones).

The product of its digits is 3600, while the sum is 25.

The square root of 55312243 is about 7437.2201123807. The cubic root of 55312243 is about 381.0135522858.

Adding to 55312243 its reverse (34221355), we get a palindrome (89533598).

It can be divided in two parts, 55312 and 243, that added together give a palindrome (55555).

The spelling of 55312243 in words is "fifty-five million, three hundred twelve thousand, two hundred forty-three".