11731231 has 8 divisors (see below), whose sum is σ = 11965824. Its totient is φ = 11498520.

The previous prime is 11731211. The next prime is 11731243. The reversal of 11731231 is 13213711.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11731231 - 2⁷ = 11731103 is a prime.

It is a super-2 number, since 2×11731231² = 275243561550722, 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 = 11731199 and 11731208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11731201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20556 + ... + 21118.

It is an arithmetic number, because the mean of its divisors is an integer number (1495728).

Almost surely, 2^11731231 is an apocalyptic number.

11731231 is a deficient number, since it is larger than the sum of its proper divisors (234593).

11731231 is an equidigital number, since it uses as much as digits as its factorization.

11731231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 941.

The product of its digits is 126, while the sum is 19.

The square root of 11731231 is about 3425.0884660108. The cubic root of 11731231 is about 227.2206836518.

Adding to 11731231 its reverse (13213711), we get a palindrome (24944942).

The spelling of 11731231 in words is "eleven million, seven hundred thirty-one thousand, two hundred thirty-one".