55406203 has 2 divisors, whose sum is σ = 55406204. Its totient is φ = 55406202.

The previous prime is 55406189. The next prime is 55406209. The reversal of 55406203 is 30260455.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55406203 - 2²¹ = 53309051 is a prime.

It is not a weakly prime, because it can be changed into another prime (55406209) 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, 27703101 + 27703102.

It is an arithmetic number, because the mean of its divisors is an integer number (27703102).

Almost surely, 2^55406203 is an apocalyptic number.

55406203 is a deficient number, since it is larger than the sum of its proper divisors (1).

55406203 is an equidigital number, since it uses as much as digits as its factorization.

55406203 is an odious number, because the sum of its binary digits is odd.

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

The square root of 55406203 is about 7443.5343083780. The cubic root of 55406203 is about 381.2291753205.

Adding to 55406203 its reverse (30260455), we get a palindrome (85666658).

The spelling of 55406203 in words is "fifty-five million, four hundred six thousand, two hundred three".