11313531 has 12 divisors (see below), whose sum is σ = 17202120. Its totient is φ = 7145280.

The previous prime is 11313521. The next prime is 11313557. The reversal of 11313531 is 13531311.

11313531 is a `hidden beast` number, since 1 + 131 + 3 + 531 = 666.

It is not a de Polignac number, because 11313531 - 2⁷ = 11313403 is a prime.

It is a super-2 number, since 2×11313531² = 255991967375922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11313521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32910 + ... + 33251.

It is an arithmetic number, because the mean of its divisors is an integer number (1433510).

Almost surely, 2^11313531 is an apocalyptic number.

11313531 is a deficient number, since it is larger than the sum of its proper divisors (5888589).

11313531 is a wasteful number, since it uses less digits than its factorization.

11313531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66186 (or 66183 counting only the distinct ones).

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

The square root of 11313531 is about 3363.5592755294. The cubic root of 11313531 is about 224.4912356471.

Adding to 11313531 its reverse (13531311), we get a palindrome (24844842).

The spelling of 11313531 in words is "eleven million, three hundred thirteen thousand, five hundred thirty-one".