11717231 has 4 divisors (see below), whose sum is σ = 11730552. Its totient is φ = 11703912.

The previous prime is 11717219. The next prime is 11717239. The reversal of 11717231 is 13271711.

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 11717231 - 2¹⁴ = 11700847 is a prime.

It is a super-2 number, since 2×11717231² = 274587004614722, 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 = 11717197 and 11717206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11717239) 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, 5240 + ... + 7133.

It is an arithmetic number, because the mean of its divisors is an integer number (2932638).

Almost surely, 2^11717231 is an apocalyptic number.

11717231 is a deficient number, since it is larger than the sum of its proper divisors (13321).

11717231 is an equidigital number, since it uses as much as digits as its factorization.

11717231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13320.

The product of its digits is 294, while the sum is 23.

The square root of 11717231 is about 3423.0441130666. The cubic root of 11717231 is about 227.1302596135.

Adding to 11717231 its reverse (13271711), we get a palindrome (24988942).

The spelling of 11717231 in words is "eleven million, seven hundred seventeen thousand, two hundred thirty-one".