13855557 has 8 divisors (see below), whose sum is σ = 18497376. Its totient is φ = 9225392.

The previous prime is 13855549. The next prime is 13855559. The reversal of 13855557 is 75555831.

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 13855557 - 2³ = 13855549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13855559) by changing a digit.

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, 403 + ... + 5279.

It is an arithmetic number, because the mean of its divisors is an integer number (2312172).

Almost surely, 2^13855557 is an apocalyptic number.

It is an amenable number.

13855557 is a deficient number, since it is larger than the sum of its proper divisors (4641819).

13855557 is an equidigital number, since it uses as much as digits as its factorization.

13855557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5827.

The product of its digits is 105000, while the sum is 39.

The square root of 13855557 is about 3722.3053340638. The cubic root of 13855557 is about 240.1824827428.

The spelling of 13855557 in words is "thirteen million, eight hundred fifty-five thousand, five hundred fifty-seven".