13155771 has 16 divisors (see below), whose sum is σ = 18541440. Its totient is φ = 8274240.

The previous prime is 13155767. The next prime is 13155781. The reversal of 13155771 is 17755131.

It is not a de Polignac number, because 13155771 - 2² = 13155767 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13155781) 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, 24991 + ... + 25511.

It is an arithmetic number, because the mean of its divisors is an integer number (1158840).

Almost surely, 2^13155771 is an apocalyptic number.

13155771 is a deficient number, since it is larger than the sum of its proper divisors (5385669).

13155771 is a wasteful number, since it uses less digits than its factorization.

13155771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 986.

The product of its digits is 3675, while the sum is 30.

The square root of 13155771 is about 3627.0885018152. The cubic root of 13155771 is about 236.0688956662.

The spelling of 13155771 in words is "thirteen million, one hundred fifty-five thousand, seven hundred seventy-one".