13853381 has 4 divisors (see below), whose sum is σ = 13959264. Its totient is φ = 13747500.

The previous prime is 13853369. The next prime is 13853393. The reversal of 13853381 is 18335831.

13853381 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, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18335831 = 37 ⋅495563.

It is an interprime number because it is at equal distance from previous prime (13853369) and next prime (13853393).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13853381 is a prime.

It is a super-2 number, since 2×13853381² = 383832330262322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13853341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52745 + ... + 53006.

It is an arithmetic number, because the mean of its divisors is an integer number (3489816).

Almost surely, 2^13853381 is an apocalyptic number.

It is an amenable number.

13853381 is a deficient number, since it is larger than the sum of its proper divisors (105883).

13853381 is a wasteful number, since it uses less digits than its factorization.

13853381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105882.

The product of its digits is 8640, while the sum is 32.

The square root of 13853381 is about 3722.0130306059. The cubic root of 13853381 is about 240.1699086196.

The spelling of 13853381 in words is "thirteen million, eight hundred fifty-three thousand, three hundred eighty-one".