55511243 has 2 divisors, whose sum is σ = 55511244. Its totient is φ = 55511242.

The previous prime is 55511231. The next prime is 55511263. The reversal of 55511243 is 34211555.

55511243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55511243 - 2⁴ = 55511227 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55511263) 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 as a sum of consecutive naturals, namely, 27755621 + 27755622.

It is an arithmetic number, because the mean of its divisors is an integer number (27755622).

Almost surely, 2^55511243 is an apocalyptic number.

55511243 is a deficient number, since it is larger than the sum of its proper divisors (1).

55511243 is an equidigital number, since it uses as much as digits as its factorization.

55511243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3000, while the sum is 26.

The square root of 55511243 is about 7450.5867554173. The cubic root of 55511243 is about 381.4699367724.

Adding to 55511243 its reverse (34211555), we get a palindrome (89722798).

The spelling of 55511243 in words is "fifty-five million, five hundred eleven thousand, two hundred forty-three".