13313381 has 4 divisors (see below), whose sum is σ = 13328064. Its totient is φ = 13298700.

The previous prime is 13313341. The next prime is 13313383. The reversal of 13313381 is 18331331.

It is a happy number.

13313381 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.

It is a cyclic number.

It is not a de Polignac number, because 13313381 - 2¹⁸ = 13051237 is a prime.

It is a super-2 number, since 2×13313381² = 354492227302322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13313383) 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, 5885 + ... + 7826.

It is an arithmetic number, because the mean of its divisors is an integer number (3332016).

Almost surely, 2^13313381 is an apocalyptic number.

It is an amenable number.

13313381 is a deficient number, since it is larger than the sum of its proper divisors (14683).

13313381 is an equidigital number, since it uses as much as digits as its factorization.

13313381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14682.

The product of its digits is 648, while the sum is 23.

The square root of 13313381 is about 3648.7506080849. The cubic root of 13313381 is about 237.0078807162.

The spelling of 13313381 in words is "thirteen million, three hundred thirteen thousand, three hundred eighty-one".