13193281 has 4 divisors (see below), whose sum is σ = 13200772. Its totient is φ = 13185792.

The previous prime is 13193269. The next prime is 13193293. The reversal of 13193281 is 18239131.

13193281 is digitally balanced in base 3, 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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 18239131 = 911 ⋅20021.

It is an interprime number because it is at equal distance from previous prime (13193269) and next prime (13193293).

It can be written as a sum of positive squares in 2 ways, for example, as 3207681 + 9985600 = 1791^2 + 3160^2 .

It is a cyclic number.

It is not a de Polignac number, because 13193281 - 2⁵ = 13193249 is a prime.

It is a super-2 number, since 2×13193281² = 348125327089922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13193221) 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, 505 + ... + 5161.

It is an arithmetic number, because the mean of its divisors is an integer number (3300193).

Almost surely, 2^13193281 is an apocalyptic number.

It is an amenable number.

13193281 is a deficient number, since it is larger than the sum of its proper divisors (7491).

13193281 is an equidigital number, since it uses as much as digits as its factorization.

13193281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7490.

The product of its digits is 1296, while the sum is 28.

The square root of 13193281 is about 3632.2556352768. The cubic root of 13193281 is about 236.2930442365.

The spelling of 13193281 in words is "thirteen million, one hundred ninety-three thousand, two hundred eighty-one".