13055591 has 4 divisors (see below), whose sum is σ = 13155384. Its totient is φ = 12955800.

The previous prime is 13055587. The next prime is 13055593. The reversal of 13055591 is 19555031.

It is a happy number.

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 13055591 - 2² = 13055587 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13055593) 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, 49700 + ... + 49961.

It is an arithmetic number, because the mean of its divisors is an integer number (3288846).

Almost surely, 2^13055591 is an apocalyptic number.

13055591 is a deficient number, since it is larger than the sum of its proper divisors (99793).

13055591 is an equidigital number, since it uses as much as digits as its factorization.

13055591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99792.

The product of its (nonzero) digits is 3375, while the sum is 29.

The square root of 13055591 is about 3613.2521362341. The cubic root of 13055591 is about 235.4681538190.

The spelling of 13055591 in words is "thirteen million, fifty-five thousand, five hundred ninety-one".