13143855 has 8 divisors (see below), whose sum is σ = 21030192. Its totient is φ = 7010048.

The previous prime is 13143847. The next prime is 13143881. The reversal of 13143855 is 55834131.

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 13143855 - 2³ = 13143847 is a prime.

It is a super-2 number, since 2×13143855² = 345521848522050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 438114 + ... + 438143.

It is an arithmetic number, because the mean of its divisors is an integer number (2628774).

Almost surely, 2^13143855 is an apocalyptic number.

13143855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

13143855 is a deficient number, since it is larger than the sum of its proper divisors (7886337).

13143855 is an equidigital number, since it uses as much as digits as its factorization.

13143855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 876265.

The product of its digits is 7200, while the sum is 30.

The square root of 13143855 is about 3625.4454898674. The cubic root of 13143855 is about 235.9976000426.

Adding to 13143855 its reverse (55834131), we get a palindrome (68977986).

The spelling of 13143855 in words is "thirteen million, one hundred forty-three thousand, eight hundred fifty-five".