55564543 has 2 divisors, whose sum is σ = 55564544. Its totient is φ = 55564542.

The previous prime is 55564519. The next prime is 55564549. The reversal of 55564543 is 34546555.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55564543 - 2⁹ = 55564031 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55564549) 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 as a sum of consecutive naturals, namely, 27782271 + 27782272.

It is an arithmetic number, because the mean of its divisors is an integer number (27782272).

Almost surely, 2^55564543 is an apocalyptic number.

55564543 is a deficient number, since it is larger than the sum of its proper divisors (1).

55564543 is an equidigital number, since it uses as much as digits as its factorization.

55564543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 180000, while the sum is 37.

The square root of 55564543 is about 7454.1627967197. The cubic root of 55564543 is about 381.5919891863.

The spelling of 55564543 in words is "fifty-five million, five hundred sixty-four thousand, five hundred forty-three".