13333331 has 4 divisors (see below), whose sum is σ = 14545464. Its totient is φ = 12121200.

The previous prime is 13333291. The next prime is 13333339.

13333331 is nontrivially palindromic in base 10.

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 13333331 - 2⁶ = 13333267 is a prime.

It is a super-2 number, since 2×13333331² = 355555431111122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13333339) 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, 606050 + ... + 606071.

It is an arithmetic number, because the mean of its divisors is an integer number (3636366).

Almost surely, 2^13333331 is an apocalyptic number.

13333331 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13333331 is a deficient number, since it is larger than the sum of its proper divisors (1212133).

13333331 is a wasteful number, since it uses less digits than its factorization.

13333331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1212132.

The product of its digits is 729, while the sum is 20.

The square root of 13333331 is about 3651.4833971963. The cubic root of 13333331 is about 237.1262064670.

It can be divided in two parts, 1333 and 3331, that added together give a palindrome (4664).

The spelling of 13333331 in words is "thirteen million, three hundred thirty-three thousand, three hundred thirty-one".