11831881 has 8 divisors (see below), whose sum is σ = 12559104. Its totient is φ = 11108160.

The previous prime is 11831873. The next prime is 11831917. The reversal of 11831881 is 18813811.

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 11831881 - 2³ = 11831873 is a prime.

It is a super-2 number, since 2×11831881² = 279986815996322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11831861) 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, 10176 + ... + 11278.

It is an arithmetic number, because the mean of its divisors is an integer number (1569888).

Almost surely, 2^11831881 is an apocalyptic number.

It is an amenable number.

11831881 is a deficient number, since it is larger than the sum of its proper divisors (727223).

11831881 is a wasteful number, since it uses less digits than its factorization.

11831881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1751.

The product of its digits is 1536, while the sum is 31.

The square root of 11831881 is about 3439.7501362744. The cubic root of 11831881 is about 227.8686596072.

The spelling of 11831881 in words is "eleven million, eight hundred thirty-one thousand, eight hundred eighty-one".