11155220563 has 2 divisors, whose sum is σ = 11155220564. Its totient is φ = 11155220562.

The previous prime is 11155220537. The next prime is 11155220569. The reversal of 11155220563 is 36502255111.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11155220563 is a prime.

It is not a weakly prime, because it can be changed into another prime (11155220569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5577610281 + 5577610282.

It is an arithmetic number, because the mean of its divisors is an integer number (5577610282).

Almost surely, 2^11155220563 is an apocalyptic number.

11155220563 is a deficient number, since it is larger than the sum of its proper divisors (1).

11155220563 is an equidigital number, since it uses as much as digits as its factorization.

11155220563 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9000, while the sum is 31.

Adding to 11155220563 its reverse (36502255111), we get a palindrome (47657475674).

The spelling of 11155220563 in words is "eleven billion, one hundred fifty-five million, two hundred twenty thousand, five hundred sixty-three".