11611131 has 16 divisors (see below), whose sum is σ = 17740800. Its totient is φ = 6617088.

The previous prime is 11611121. The next prime is 11611133. The reversal of 11611131 is 13111611.

It is not a de Polignac number, because 11611131 - 2⁹ = 11610619 is a prime.

It is a super-2 number, since 2×11611131² = 269636726198322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11611131.

It is not an unprimeable number, because it can be changed into a prime (11611133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14715 + ... + 15483.

It is an arithmetic number, because the mean of its divisors is an integer number (1108800).

Almost surely, 2^11611131 is an apocalyptic number.

11611131 is a deficient number, since it is larger than the sum of its proper divisors (6129669).

11611131 is an equidigital number, since it uses as much as digits as its factorization.

11611131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1498.

The product of its digits is 18, while the sum is 15.

The square root of 11611131 is about 3407.5109684343. The cubic root of 11611131 is about 226.4426219975.

Adding to 11611131 its reverse (13111611), we get a palindrome (24722742).

The spelling of 11611131 in words is "eleven million, six hundred eleven thousand, one hundred thirty-one".