11331331 has 4 divisors (see below), whose sum is σ = 12361464. Its totient is φ = 10301200.

The previous prime is 11331329. The next prime is 11331343. The reversal of 11331331 is 13313311.

11331331 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.

It is a cyclic number.

It is not a de Polignac number, because 11331331 - 2¹ = 11331329 is a prime.

It is a super-2 number, since 2×11331331² = 256798124463122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11331311) 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, 515050 + ... + 515071.

It is an arithmetic number, because the mean of its divisors is an integer number (3090366).

Almost surely, 2^11331331 is an apocalyptic number.

11331331 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11331331 is a deficient number, since it is larger than the sum of its proper divisors (1030133).

11331331 is a wasteful number, since it uses less digits than its factorization.

11331331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1030132.

The product of its digits is 81, while the sum is 16.

The square root of 11331331 is about 3366.2042421695. The cubic root of 11331331 is about 224.6089074323.

Adding to 11331331 its reverse (13313311), we get a palindrome (24644642).

The spelling of 11331331 in words is "eleven million, three hundred thirty-one thousand, three hundred thirty-one".