55538563 has 2 divisors, whose sum is σ = 55538564. Its totient is φ = 55538562.

The previous prime is 55538531. The next prime is 55538569. The reversal of 55538563 is 36583555.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55538563 - 2⁵ = 55538531 is a prime.

It is not a weakly prime, because it can be changed into another prime (55538569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27769281 + 27769282.

It is an arithmetic number, because the mean of its divisors is an integer number (27769282).

Almost surely, 2^55538563 is an apocalyptic number.

55538563 is a deficient number, since it is larger than the sum of its proper divisors (1).

55538563 is an equidigital number, since it uses as much as digits as its factorization.

55538563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 270000, while the sum is 40.

The square root of 55538563 is about 7452.4199425422. The cubic root of 55538563 is about 381.5325069767.

The spelling of 55538563 in words is "fifty-five million, five hundred thirty-eight thousand, five hundred sixty-three".