11631131 has 4 divisors (see below), whose sum is σ = 11662200. Its totient is φ = 11600064.

The previous prime is 11631101. The next prime is 11631157. The reversal of 11631131 is 13113611.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11631131 is a prime.

It is a super-2 number, since 2×11631131² = 270566416678322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11631101) 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, 14966 + ... + 15723.

It is an arithmetic number, because the mean of its divisors is an integer number (2915550).

Almost surely, 2^11631131 is an apocalyptic number.

11631131 is a deficient number, since it is larger than the sum of its proper divisors (31069).

11631131 is an equidigital number, since it uses as much as digits as its factorization.

11631131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31068.

The product of its digits is 54, while the sum is 17.

The square root of 11631131 is about 3410.4443991949. Note that the first 3 decimals coincide. The cubic root of 11631131 is about 226.5725620993.

Adding to 11631131 its reverse (13113611), we get a palindrome (24744742).

The spelling of 11631131 in words is "eleven million, six hundred thirty-one thousand, one hundred thirty-one".