1131883581 has 8 divisors (see below), whose sum is σ = 1509333984. Its totient is φ = 754511120.

The previous prime is 1131883559. The next prime is 1131883589. The reversal of 1131883581 is 1853881311.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1131883581 - 2⁵ = 1131883549 is a prime.

It is a super-2 number, since 2×1131883581² = 2562320881874767122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131883589) 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 7 ways as a sum of consecutive naturals, for example, 43366 + ... + 64376.

It is an arithmetic number, because the mean of its divisors is an integer number (188666748).

Almost surely, 2^1131883581 is an apocalyptic number.

It is an amenable number.

1131883581 is a deficient number, since it is larger than the sum of its proper divisors (377450403).

1131883581 is a wasteful number, since it uses less digits than its factorization.

1131883581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38971.

The product of its digits is 23040, while the sum is 39.

The square root of 1131883581 is about 33643.4775402306. The cubic root of 1131883581 is about 1042.1588479383.

The spelling of 1131883581 in words is "one billion, one hundred thirty-one million, eight hundred eighty-three thousand, five hundred eighty-one".