13311855 has 12 divisors (see below), whose sum is σ = 23073960. Its totient is φ = 7099632.

The previous prime is 13311853. The next prime is 13311863. The reversal of 13311855 is 55811331.

It is not a de Polignac number, because 13311855 - 2¹ = 13311853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13311853) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 147865 + ... + 147954.

It is an arithmetic number, because the mean of its divisors is an integer number (1922830).

Almost surely, 2^13311855 is an apocalyptic number.

13311855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

13311855 is a deficient number, since it is larger than the sum of its proper divisors (9762105).

13311855 is a wasteful number, since it uses less digits than its factorization.

13311855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295830 (or 295827 counting only the distinct ones).

The product of its digits is 1800, while the sum is 27.

The square root of 13311855 is about 3648.5414894174. The cubic root of 13311855 is about 236.9988249688.

The spelling of 13311855 in words is "thirteen million, three hundred eleven thousand, eight hundred fifty-five".