11631291 has 32 divisors (see below), whose sum is σ = 18662400. Its totient is φ = 6303360.

The previous prime is 11631289. The next prime is 11631311. The reversal of 11631291 is 19213611.

It is not a de Polignac number, because 11631291 - 2¹ = 11631289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11631251) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43105 + ... + 43373.

It is an arithmetic number, because the mean of its divisors is an integer number (583200).

Almost surely, 2^11631291 is an apocalyptic number.

11631291 is a deficient number, since it is larger than the sum of its proper divisors (7031109).

11631291 is a wasteful number, since it uses less digits than its factorization.

11631291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379.

The product of its digits is 324, while the sum is 24.

The square root of 11631291 is about 3410.4678564678. The cubic root of 11631291 is about 226.5736010193.

It can be divided in two parts, 116312 and 91, that added together give a triangular number (116403 = T₄₈₂).

The spelling of 11631291 in words is "eleven million, six hundred thirty-one thousand, two hundred ninety-one".