13445563 has 4 divisors (see below), whose sum is σ = 13615840. Its totient is φ = 13275288.

The previous prime is 13445561. The next prime is 13445567. The reversal of 13445563 is 36554431.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13445563 - 2¹ = 13445561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13445561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85020 + ... + 85177.

It is an arithmetic number, because the mean of its divisors is an integer number (3403960).

Almost surely, 2^13445563 is an apocalyptic number.

13445563 is a deficient number, since it is larger than the sum of its proper divisors (170277).

13445563 is an equidigital number, since it uses as much as digits as its factorization.

13445563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170276.

The product of its digits is 21600, while the sum is 31.

The square root of 13445563 is about 3666.8191937973. The cubic root of 13445563 is about 237.7896771946.

Adding to 13445563 its reverse (36554431), we get a palindrome (49999994).

The spelling of 13445563 in words is "thirteen million, four hundred forty-five thousand, five hundred sixty-three".