13855213 has 4 divisors (see below), whose sum is σ = 13917568. Its totient is φ = 13792860.

The previous prime is 13855211. The next prime is 13855249. The reversal of 13855213 is 31255831.

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: 31255831 = 2039 ⋅15329.

It is a cyclic number.

It is not a de Polignac number, because 13855213 - 2¹ = 13855211 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13855211) 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, 30843 + ... + 31288.

It is an arithmetic number, because the mean of its divisors is an integer number (3479392).

Almost surely, 2^13855213 is an apocalyptic number.

It is an amenable number.

13855213 is a deficient number, since it is larger than the sum of its proper divisors (62355).

13855213 is an equidigital number, since it uses as much as digits as its factorization.

13855213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62354.

The product of its digits is 3600, while the sum is 28.

The square root of 13855213 is about 3722.2591258535. The cubic root of 13855213 is about 240.1804950095.

The spelling of 13855213 in words is "thirteen million, eight hundred fifty-five thousand, two hundred thirteen".