11531135 has 32 divisors (see below), whose sum is σ = 17570304. Its totient is φ = 7056000.

The previous prime is 11531131. The next prime is 11531141. The reversal of 11531135 is 53113511.

It is not a de Polignac number, because 11531135 - 2² = 11531131 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11531131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23240 + ... + 23730.

It is an arithmetic number, because the mean of its divisors is an integer number (549072).

Almost surely, 2^11531135 is an apocalyptic number.

11531135 is a deficient number, since it is larger than the sum of its proper divisors (6039169).

11531135 is a wasteful number, since it uses less digits than its factorization.

11531135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 575.

The product of its digits is 225, while the sum is 20.

The square root of 11531135 is about 3395.7524939253. The cubic root of 11531135 is about 225.9213904169.

Adding to 11531135 its reverse (53113511), we get a palindrome (64644646).

It can be divided in two parts, 11 and 531135, that multiplied together give a palindrome (5842485).

The spelling of 11531135 in words is "eleven million, five hundred thirty-one thousand, one hundred thirty-five".