11311331 has 4 divisors (see below), whose sum is σ = 11803152. Its totient is φ = 10819512.

The previous prime is 11311319. The next prime is 11311337. The reversal of 11311331 is 13311311.

It is a happy number.

11311331 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 an emirpimes, since its reverse is a distinct semiprime: 13311311 = 13 ⋅1023947.

It is a cyclic number.

It is not a de Polignac number, because 11311331 - 2¹⁰ = 11310307 is a prime.

It is a super-2 number, since 2×11311331² = 255892417983122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11311337) 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, 245876 + ... + 245921.

It is an arithmetic number, because the mean of its divisors is an integer number (2950788).

Almost surely, 2^11311331 is an apocalyptic number.

11311331 is a deficient number, since it is larger than the sum of its proper divisors (491821).

11311331 is an equidigital number, since it uses as much as digits as its factorization.

11311331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491820.

The product of its digits is 27, while the sum is 14.

The square root of 11311331 is about 3363.2322251073. The cubic root of 11311331 is about 224.4766833753.

Adding to 11311331 its reverse (13311311), we get a palindrome (24622642).

The spelling of 11311331 in words is "eleven million, three hundred eleven thousand, three hundred thirty-one".