11315881 has 4 divisors (see below), whose sum is σ = 11459200. Its totient is φ = 11172564.

The previous prime is 11315873. The next prime is 11315891. The reversal of 11315881 is 18851311.

11315881 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11315881 - 2³ = 11315873 is a prime.

It is a super-2 number, since 2×11315881² = 256098325612322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11315891) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71541 + ... + 71698.

It is an arithmetic number, because the mean of its divisors is an integer number (2864800).

Almost surely, 2^11315881 is an apocalyptic number.

It is an amenable number.

11315881 is a deficient number, since it is larger than the sum of its proper divisors (143319).

11315881 is an equidigital number, since it uses as much as digits as its factorization.

11315881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143318.

The product of its digits is 960, while the sum is 28.

The square root of 11315881 is about 3363.9085897212. The cubic root of 11315881 is about 224.5067780355.

The spelling of 11315881 in words is "eleven million, three hundred fifteen thousand, eight hundred eighty-one".