11631231 has 24 divisors (see below), whose sum is σ = 17731584. Its totient is φ = 7336080.

The previous prime is 11631229. The next prime is 11631239. The reversal of 11631231 is 13213611.

11631231 is a `hidden beast` number, since 1 + 1 + 631 + 2 + 31 = 666.

11631231 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11631231 - 2¹ = 11631229 is a prime.

It is a super-2 number, since 2×11631231² = 270571069150722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11631239) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12670 + ... + 13556.

It is an arithmetic number, because the mean of its divisors is an integer number (738816).

Almost surely, 2^11631231 is an apocalyptic number.

11631231 is a deficient number, since it is larger than the sum of its proper divisors (6100353).

11631231 is a wasteful number, since it uses less digits than its factorization.

11631231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 971 (or 968 counting only the distinct ones).

The product of its digits is 108, while the sum is 18.

The square root of 11631231 is about 3410.4590600094. The cubic root of 11631231 is about 226.5732114254.

Adding to 11631231 its reverse (13213611), we get a palindrome (24844842).

The spelling of 11631231 in words is "eleven million, six hundred thirty-one thousand, two hundred thirty-one".