13255591 has 4 divisors (see below), whose sum is σ = 13325184. Its totient is φ = 13186000.

The previous prime is 13255579. The next prime is 13255601. The reversal of 13255591 is 19555231.

13255591 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.

It is a cyclic number.

It is not a de Polignac number, because 13255591 - 2¹⁵ = 13222823 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13255511) 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, 34510 + ... + 34891.

It is an arithmetic number, because the mean of its divisors is an integer number (3331296).

Almost surely, 2^13255591 is an apocalyptic number.

13255591 is a deficient number, since it is larger than the sum of its proper divisors (69593).

13255591 is an equidigital number, since it uses as much as digits as its factorization.

13255591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69592.

The product of its digits is 6750, while the sum is 31.

The square root of 13255591 is about 3640.8228465554. The cubic root of 13255591 is about 236.6644530199.

The spelling of 13255591 in words is "thirteen million, two hundred fifty-five thousand, five hundred ninety-one".