11131566 has 16 divisors (see below), whose sum is σ = 23572944. Its totient is φ = 3492224.

The previous prime is 11131559. The next prime is 11131567. The reversal of 11131566 is 66513111.

It is a super-2 number, since 2×11131566² = 247823523224712, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11131567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54465 + ... + 54668.

It is an arithmetic number, because the mean of its divisors is an integer number (1473309).

Almost surely, 2^11131566 is an apocalyptic number.

11131566 is an abundant number, since it is smaller than the sum of its proper divisors (12441378).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11131566 is a wasteful number, since it uses less digits than its factorization.

11131566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109155.

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

The square root of 11131566 is about 3336.4001558566. The cubic root of 11131566 is about 223.2811645183.

Adding to 11131566 its reverse (66513111), we get a palindrome (77644677).

The spelling of 11131566 in words is "eleven million, one hundred thirty-one thousand, five hundred sixty-six".