13381771 has 16 divisors (see below), whose sum is σ = 15398208. Its totient is φ = 11520000.

The previous prime is 13381769. The next prime is 13381777. The reversal of 13381771 is 17718331.

It is a 11-Lehmer number, since φ(13381771) divides (13381771-1)¹¹.

It is a cyclic number.

It is not a de Polignac number, because 13381771 - 2¹ = 13381769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13381777) 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, 33171 + ... + 33571.

It is an arithmetic number, because the mean of its divisors is an integer number (962388).

Almost surely, 2^13381771 is an apocalyptic number.

13381771 is a deficient number, since it is larger than the sum of its proper divisors (2016437).

13381771 is a wasteful number, since it uses less digits than its factorization.

13381771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 582.

The product of its digits is 3528, while the sum is 31.

The square root of 13381771 is about 3658.1103045152. The cubic root of 13381771 is about 237.4130193028.

The spelling of 13381771 in words is "thirteen million, three hundred eighty-one thousand, seven hundred seventy-one".