55512243 has 16 divisors (see below), whose sum is σ = 86569600. Its totient is φ = 35060040.

The previous prime is 55512241. The next prime is 55512287. The reversal of 55512243 is 34221555.

It is a happy number.

It is not a de Polignac number, because 55512243 - 2¹ = 55512241 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55512241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53593 + ... + 54618.

It is an arithmetic number, because the mean of its divisors is an integer number (5410600).

Almost surely, 2^55512243 is an apocalyptic number.

55512243 is a deficient number, since it is larger than the sum of its proper divisors (31057357).

55512243 is a wasteful number, since it uses less digits than its factorization.

55512243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108239 (or 108233 counting only the distinct ones).

The product of its digits is 6000, while the sum is 27.

The square root of 55512243 is about 7450.6538639236. The cubic root of 55512243 is about 381.4722274053.

Adding to 55512243 its reverse (34221555), we get a palindrome (89733798).

It can be divided in two parts, 55512 and 243, that added together give a palindrome (55755).

The spelling of 55512243 in words is "fifty-five million, five hundred twelve thousand, two hundred forty-three".