11165631 has 4 divisors (see below), whose sum is σ = 14887512. Its totient is φ = 7443752.

The previous prime is 11165621. The next prime is 11165639. The reversal of 11165631 is 13656111.

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 11165631 - 2¹⁰ = 11164607 is a prime.

It is a super-2 number, since 2×11165631² = 249342631256322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11165639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1860936 + ... + 1860941.

It is an arithmetic number, because the mean of its divisors is an integer number (3721878).

Almost surely, 2^11165631 is an apocalyptic number.

11165631 is a deficient number, since it is larger than the sum of its proper divisors (3721881).

11165631 is an equidigital number, since it uses as much as digits as its factorization.

11165631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3721880.

The product of its digits is 540, while the sum is 24.

The square root of 11165631 is about 3341.5013092920. The cubic root of 11165631 is about 223.5086954662.

The spelling of 11165631 in words is "eleven million, one hundred sixty-five thousand, six hundred thirty-one".