13312291 has 4 divisors (see below), whose sum is σ = 13329792. Its totient is φ = 13294792.

The previous prime is 13312283. The next prime is 13312303. The reversal of 13312291 is 19221331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19221331 = 19 ⋅1011649.

It is a cyclic number.

It is not a de Polignac number, because 13312291 - 2³ = 13312283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13312231) 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, 7555 + ... + 9148.

It is an arithmetic number, because the mean of its divisors is an integer number (3332448).

Almost surely, 2^13312291 is an apocalyptic number.

13312291 is a deficient number, since it is larger than the sum of its proper divisors (17501).

13312291 is an equidigital number, since it uses as much as digits as its factorization.

13312291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17500.

The product of its digits is 324, while the sum is 22.

The square root of 13312291 is about 3648.6012388311. The cubic root of 13312291 is about 237.0014123958.

The spelling of 13312291 in words is "thirteen million, three hundred twelve thousand, two hundred ninety-one".