13858921571 has 4 divisors (see below), whose sum is σ = 15118823544. Its totient is φ = 12599019600.

The previous prime is 13858921547. The next prime is 13858921579. The reversal of 13858921571 is 17512985831.

13858921571 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13858921571 - 2¹⁰ = 13858920547 is a prime.

It is a super-2 number, since 2×13858921571² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13858921579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 629950970 + ... + 629950991.

It is an arithmetic number, because the mean of its divisors is an integer number (3779705886).

Almost surely, 2^13858921571 is an apocalyptic number.

13858921571 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13858921571 is a deficient number, since it is larger than the sum of its proper divisors (1259901973).

13858921571 is a wasteful number, since it uses less digits than its factorization.

13858921571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1259901972.

The product of its digits is 604800, while the sum is 50.

The spelling of 13858921571 in words is "thirteen billion, eight hundred fifty-eight million, nine hundred twenty-one thousand, five hundred seventy-one".