13113533 has 4 divisors (see below), whose sum is σ = 13168188. Its totient is φ = 13058880.

The previous prime is 13113521. The next prime is 13113547. The reversal of 13113533 is 33531131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 33531131 = 1499 ⋅22369.

It can be written as a sum of positive squares in 2 ways, for example, as 8631844 + 4481689 = 2938^2 + 2117^2 .

It is a cyclic number.

It is not a de Polignac number, because 13113533 - 2¹⁸ = 12851389 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13113593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26966 + ... + 27447.

It is an arithmetic number, because the mean of its divisors is an integer number (3292047).

Almost surely, 2^13113533 is an apocalyptic number.

It is an amenable number.

13113533 is a deficient number, since it is larger than the sum of its proper divisors (54655).

13113533 is an equidigital number, since it uses as much as digits as its factorization.

13113533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54654.

The product of its digits is 405, while the sum is 20.

The square root of 13113533 is about 3621.2612443733. The cubic root of 13113533 is about 235.8159833851.

Adding to 13113533 its reverse (33531131), we get a palindrome (46644664).

The spelling of 13113533 in words is "thirteen million, one hundred thirteen thousand, five hundred thirty-three".