13011331 has 4 divisors (see below), whose sum is σ = 13084200. Its totient is φ = 12938464.

The previous prime is 13011319. The next prime is 13011337. The reversal of 13011331 is 13311031.

It is a happy number.

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 13011331 - 2⁷ = 13011203 is a prime.

It is a super-3 number, since 3×13011331³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13011337) 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, 36166 + ... + 36523.

It is an arithmetic number, because the mean of its divisors is an integer number (3271050).

Almost surely, 2^13011331 is an apocalyptic number.

13011331 is a deficient number, since it is larger than the sum of its proper divisors (72869).

13011331 is an equidigital number, since it uses as much as digits as its factorization.

13011331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72868.

The product of its (nonzero) digits is 27, while the sum is 13.

The square root of 13011331 is about 3607.1222601958. The cubic root of 13011331 is about 235.2017642497.

Adding to 13011331 its reverse (13311031), we get a palindrome (26322362).

The spelling of 13011331 in words is "thirteen million, eleven thousand, three hundred thirty-one".