11195881 has 2 divisors, whose sum is σ = 11195882. Its totient is φ = 11195880.

The previous prime is 11195869. The next prime is 11195887. The reversal of 11195881 is 18859111.

11195881 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10530025 + 665856 = 3245^2 + 816^2 .

It is an emirp because it is prime and its reverse (18859111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11195881 - 2¹⁹ = 10671593 is a prime.

It is a super-2 number, since 2×11195881² = 250695502732322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11195887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5597940 + 5597941.

It is an arithmetic number, because the mean of its divisors is an integer number (5597941).

Almost surely, 2^11195881 is an apocalyptic number.

It is an amenable number.

11195881 is a deficient number, since it is larger than the sum of its proper divisors (1).

11195881 is an equidigital number, since it uses as much as digits as its factorization.

11195881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2880, while the sum is 34.

The square root of 11195881 is about 3346.0246562152. The cubic root of 11195881 is about 223.7103571976.

The spelling of 11195881 in words is "eleven million, one hundred ninety-five thousand, eight hundred eighty-one".