13131855 has 64 divisors (see below), whose sum is σ = 26265600. Its totient is φ = 6168960.

The previous prime is 13131851. The next prime is 13131883. The reversal of 13131855 is 55813131.

It is not a de Polignac number, because 13131855 - 2² = 13131851 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13131851) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 54826 + ... + 55064.

It is an arithmetic number, because the mean of its divisors is an integer number (410400).

Almost surely, 2^13131855 is an apocalyptic number.

13131855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

13131855 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

13131855 is a wasteful number, since it uses less digits than its factorization.

13131855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301 (or 295 counting only the distinct ones).

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

The square root of 13131855 is about 3623.7901429305. The cubic root of 13131855 is about 235.9257582713.

Adding to 13131855 its reverse (55813131), we get a palindrome (68944986).

The spelling of 13131855 in words is "thirteen million, one hundred thirty-one thousand, eight hundred fifty-five".