55205863 has 2 divisors, whose sum is σ = 55205864. Its totient is φ = 55205862.

The previous prime is 55205861. The next prime is 55205869. The reversal of 55205863 is 36850255.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55205863 - 2¹ = 55205861 is a prime.

Together with 55205861, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55205861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27602931 + 27602932.

It is an arithmetic number, because the mean of its divisors is an integer number (27602932).

Almost surely, 2^55205863 is an apocalyptic number.

55205863 is a deficient number, since it is larger than the sum of its proper divisors (1).

55205863 is an equidigital number, since it uses as much as digits as its factorization.

55205863 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36000, while the sum is 34.

The square root of 55205863 is about 7430.0648045626. The cubic root of 55205863 is about 380.7691324129.

The spelling of 55205863 in words is "fifty-five million, two hundred five thousand, eight hundred sixty-three".