13111855 has 8 divisors (see below), whose sum is σ = 15835392. Its totient is φ = 10422048.

The previous prime is 13111849. The next prime is 13111871. The reversal of 13111855 is 55811131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13111855 - 2¹⁷ = 12980783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7567 + ... + 9136.

It is an arithmetic number, because the mean of its divisors is an integer number (1979424).

Almost surely, 2^13111855 is an apocalyptic number.

13111855 is a deficient number, since it is larger than the sum of its proper divisors (2723537).

13111855 is a wasteful number, since it uses less digits than its factorization.

13111855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16865.

The product of its digits is 600, while the sum is 25.

The square root of 13111855 is about 3621.0295497275. The cubic root of 13111855 is about 235.8059246644.

Adding to 13111855 its reverse (55811131), we get a palindrome (68922986).

The spelling of 13111855 in words is "thirteen million, one hundred eleven thousand, eight hundred fifty-five".