11381881 has 8 divisors (see below), whose sum is σ = 13077504. Its totient is φ = 9703680.

The previous prime is 11381879. The next prime is 11381899. The reversal of 11381881 is 18818311.

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

It is not a de Polignac number, because 11381881 - 2¹ = 11381879 is a prime.

It is a super-2 number, since 2×11381881² = 259094430196322, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (11381831) 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, 2920 + ... + 5593.

It is an arithmetic number, because the mean of its divisors is an integer number (1634688).

Almost surely, 2^11381881 is an apocalyptic number.

It is an amenable number.

11381881 is a deficient number, since it is larger than the sum of its proper divisors (1695623).

11381881 is an equidigital number, since it uses as much as digits as its factorization.

11381881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8711.

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

The square root of 11381881 is about 3373.7043438926. The cubic root of 11381881 is about 224.9424115990.

The spelling of 11381881 in words is "eleven million, three hundred eighty-one thousand, eight hundred eighty-one".