11533131 has 16 divisors (see below), whose sum is σ = 17305600. Its totient is φ = 7590024.

The previous prime is 11533117. The next prime is 11533141. The reversal of 11533131 is 13133511.

11533131 is a `hidden beast` number, since 1 + 1 + 533 + 131 = 666.

It is not a de Polignac number, because 11533131 - 2⁷ = 11533003 is a prime.

It is a super-2 number, since 2×11533131² = 266026221326322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11533141) 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 15 ways as a sum of consecutive naturals, for example, 571 + ... + 4836.

It is an arithmetic number, because the mean of its divisors is an integer number (1081600).

Almost surely, 2^11533131 is an apocalyptic number.

11533131 is a deficient number, since it is larger than the sum of its proper divisors (5772469).

11533131 is an equidigital number, since it uses as much as digits as its factorization.

11533131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5495 (or 5489 counting only the distinct ones).

The product of its digits is 135, while the sum is 18.

The square root of 11533131 is about 3396.0463777752. The cubic root of 11533131 is about 225.9344250714.

Adding to 11533131 its reverse (13133511), we get a palindrome (24666642).

It can be divided in two parts, 11533 and 131, that added together give a square (11664 = 108²).

The spelling of 11533131 in words is "eleven million, five hundred thirty-three thousand, one hundred thirty-one".