13161563 has 4 divisors (see below), whose sum is σ = 13615440. Its totient is φ = 12707688.

The previous prime is 13161527. The next prime is 13161583. The reversal of 13161563 is 36516131.

13161563 is digitally balanced in base 2, because in such base 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: 36516131 = 467 ⋅78193.

It is a cyclic number.

It is not a de Polignac number, because 13161563 - 2¹² = 13157467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13161503) 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, 226895 + ... + 226952.

It is an arithmetic number, because the mean of its divisors is an integer number (3403860).

Almost surely, 2^13161563 is an apocalyptic number.

13161563 is a deficient number, since it is larger than the sum of its proper divisors (453877).

13161563 is an equidigital number, since it uses as much as digits as its factorization.

13161563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453876.

The product of its digits is 1620, while the sum is 26.

The square root of 13161563 is about 3627.8868504958. The cubic root of 13161563 is about 236.1035347214.

Adding to 13161563 its reverse (36516131), we get a palindrome (49677694).

The spelling of 13161563 in words is "thirteen million, one hundred sixty-one thousand, five hundred sixty-three".