13811156 has 6 divisors (see below), whose sum is σ = 24169530. Its totient is φ = 6905576.

The previous prime is 13811131. The next prime is 13811159. The reversal of 13811156 is 65111831.

It can be written as a sum of positive squares in only one way, i.e., 13808656 + 2500 = 3716^2 + 50^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13811159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1726391 + ... + 1726398.

It is an arithmetic number, because the mean of its divisors is an integer number (4028255).

Almost surely, 2^13811156 is an apocalyptic number.

It is an amenable number.

13811156 is a deficient number, since it is larger than the sum of its proper divisors (10358374).

13811156 is a wasteful number, since it uses less digits than its factorization.

13811156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3452793 (or 3452791 counting only the distinct ones).

The product of its digits is 720, while the sum is 26.

The square root of 13811156 is about 3716.3363679839. The cubic root of 13811156 is about 239.9256482646.

Adding to 13811156 its reverse (65111831), we get a palindrome (78922987).

The spelling of 13811156 in words is "thirteen million, eight hundred eleven thousand, one hundred fifty-six".