11771231 has 4 divisors (see below), whose sum is σ = 11964264. Its totient is φ = 11578200.

The previous prime is 11771213. The next prime is 11771257. The reversal of 11771231 is 13217711.

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 11771231 - 2¹⁰ = 11770207 is a prime.

It is a super-2 number, since 2×11771231² = 277123758510722, 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 = 11771197 and 11771206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11771261) 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, 96425 + ... + 96546.

It is an arithmetic number, because the mean of its divisors is an integer number (2991066).

Almost surely, 2^11771231 is an apocalyptic number.

11771231 is a deficient number, since it is larger than the sum of its proper divisors (193033).

11771231 is an equidigital number, since it uses as much as digits as its factorization.

11771231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193032.

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

The square root of 11771231 is about 3430.9227621735. The cubic root of 11771231 is about 227.4786422811.

Adding to 11771231 its reverse (13217711), we get a palindrome (24988942).

The spelling of 11771231 in words is "eleven million, seven hundred seventy-one thousand, two hundred thirty-one".