13331381 has 8 divisors (see below), whose sum is σ = 15547200. Its totient is φ = 11426604.

The previous prime is 13331309. The next prime is 13331411. The reversal of 13331381 is 18313331.

It is a happy number.

It is not a de Polignac number, because 13331381 - 2¹⁴ = 13314997 is a prime.

It is a super-2 number, since 2×13331381² = 355451438734322, 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 (13333381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19091 + ... + 19776.

It is an arithmetic number, because the mean of its divisors is an integer number (1943400).

Almost surely, 2^13331381 is an apocalyptic number.

It is an amenable number.

13331381 is a deficient number, since it is larger than the sum of its proper divisors (2215819).

13331381 is an frugal number, since it uses more digits than its factorization.

13331381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38888 (or 38874 counting only the distinct ones).

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

The square root of 13331381 is about 3651.2163726627. The cubic root of 13331381 is about 237.1146459988.

The spelling of 13331381 in words is "thirteen million, three hundred thirty-one thousand, three hundred eighty-one".