11312231 has 4 divisors (see below), whose sum is σ = 12928272. Its totient is φ = 9696192.

The previous prime is 11312221. The next prime is 11312261. The reversal of 11312231 is 13221311.

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 11312231 - 2¹⁴ = 11295847 is a prime.

It is a super-2 number, since 2×11312231² = 255933140394722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11312221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 808010 + ... + 808023.

It is an arithmetic number, because the mean of its divisors is an integer number (3232068).

Almost surely, 2^11312231 is an apocalyptic number.

11312231 is a deficient number, since it is larger than the sum of its proper divisors (1616041).

11312231 is an equidigital number, since it uses as much as digits as its factorization.

11312231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1616040.

The product of its digits is 36, while the sum is 14.

The square root of 11312231 is about 3363.3660223056. The cubic root of 11312231 is about 224.4826368054.

Adding to 11312231 its reverse (13221311), we get a palindrome (24533542).

The spelling of 11312231 in words is "eleven million, three hundred twelve thousand, two hundred thirty-one".