11317831 has 4 divisors (see below), whose sum is σ = 12934672. Its totient is φ = 9700992.

The previous prime is 11317811. The next prime is 11317849. The reversal of 11317831 is 13871311.

11317831 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: 13871311 = 19 ⋅730069.

It is not a de Polignac number, because 11317831 - 2⁵ = 11317799 is a prime.

It is a super-2 number, since 2×11317831² = 256186597089122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11317796 and 11317805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11317811) 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, 808410 + ... + 808423.

It is an arithmetic number, because the mean of its divisors is an integer number (3233668).

Almost surely, 2^11317831 is an apocalyptic number.

11317831 is a deficient number, since it is larger than the sum of its proper divisors (1616841).

11317831 is an equidigital number, since it uses as much as digits as its factorization.

11317831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1616840.

The product of its digits is 504, while the sum is 25.

The square root of 11317831 is about 3364.1984186430. The cubic root of 11317831 is about 224.5196732776.

The spelling of 11317831 in words is "eleven million, three hundred seventeen thousand, eight hundred thirty-one".