13191871 has 32 divisors (see below), whose sum is σ = 17694720. Its totient is φ = 9525600.

The previous prime is 13191821. The next prime is 13191883. The reversal of 13191871 is 17819131.

It is not a de Polignac number, because 13191871 - 2⁹ = 13191359 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 (13191821) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 103810 + ... + 103936.

It is an arithmetic number, because the mean of its divisors is an integer number (552960).

Almost surely, 2^13191871 is an apocalyptic number.

13191871 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13191871 is a deficient number, since it is larger than the sum of its proper divisors (4502849).

13191871 is a wasteful number, since it uses less digits than its factorization.

13191871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235.

The product of its digits is 1512, while the sum is 31.

The square root of 13191871 is about 3632.0615358223. The cubic root of 13191871 is about 236.2846261874.

The spelling of 13191871 in words is "thirteen million, one hundred ninety-one thousand, eight hundred seventy-one".