13055391 has 16 divisors (see below), whose sum is σ = 19526400. Its totient is φ = 8620344.

The previous prime is 13055389. The next prime is 13055401. The reversal of 13055391 is 19355031.

It is not a de Polignac number, because 13055391 - 2¹ = 13055389 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13055311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 630 + ... + 5148.

It is an arithmetic number, because the mean of its divisors is an integer number (1220400).

Almost surely, 2^13055391 is an apocalyptic number.

13055391 is a deficient number, since it is larger than the sum of its proper divisors (6471009).

13055391 is a wasteful number, since it uses less digits than its factorization.

13055391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4635 (or 4629 counting only the distinct ones).

The product of its (nonzero) digits is 2025, while the sum is 27.

The square root of 13055391 is about 3613.2244602294. The cubic root of 13055391 is about 235.4669514255.

The spelling of 13055391 in words is "thirteen million, fifty-five thousand, three hundred ninety-one".