13115771 has 4 divisors (see below), whose sum is σ = 13123272. Its totient is φ = 13108272.

The previous prime is 13115747. The next prime is 13115783. The reversal of 13115771 is 17751131.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 13115771 - 2²² = 8921467 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13115771.

It is not an unprimeable number, because it can be changed into a prime (13115171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 416 + ... + 5138.

It is an arithmetic number, because the mean of its divisors is an integer number (3280818).

Almost surely, 2^13115771 is an apocalyptic number.

13115771 is a deficient number, since it is larger than the sum of its proper divisors (7501).

13115771 is an equidigital number, since it uses as much as digits as its factorization.

13115771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7500.

The product of its digits is 735, while the sum is 26.

The square root of 13115771 is about 3621.5702395508. The cubic root of 13115771 is about 235.8293976738.

The spelling of 13115771 in words is "thirteen million, one hundred fifteen thousand, seven hundred seventy-one".