13320563 has 4 divisors (see below), whose sum is σ = 13442880. Its totient is φ = 13198248.

The previous prime is 13320557. The next prime is 13320589. The reversal of 13320563 is 36502331.

13320563 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36502331 = 941 ⋅38791.

It is a cyclic number.

It is not a de Polignac number, because 13320563 - 2¹² = 13316467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13320533) 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, 60995 + ... + 61212.

It is an arithmetic number, because the mean of its divisors is an integer number (3360720).

Almost surely, 2^13320563 is an apocalyptic number.

13320563 is a deficient number, since it is larger than the sum of its proper divisors (122317).

13320563 is a wasteful number, since it uses less digits than its factorization.

13320563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122316.

The product of its (nonzero) digits is 1620, while the sum is 23.

The square root of 13320563 is about 3649.7346478888. The cubic root of 13320563 is about 237.0504915953.

Adding to 13320563 its reverse (36502331), we get a palindrome (49822894).

The spelling of 13320563 in words is "thirteen million, three hundred twenty thousand, five hundred sixty-three".