11195561 has 8 divisors (see below), whose sum is σ = 12285000. Its totient is φ = 10138752.

The previous prime is 11195551. The next prime is 11195563. The reversal of 11195561 is 16559111.

11195561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1392400 + 9803161 = 1180^2 + 3131^2 .

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

It is not a de Polignac number, because 11195561 - 2¹⁴ = 11179177 is a prime.

It is a super-2 number, since 2×11195561² = 250681172209442, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11195563) 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, 7436 + ... + 8813.

It is an arithmetic number, because the mean of its divisors is an integer number (1535625).

Almost surely, 2^11195561 is an apocalyptic number.

It is an amenable number.

11195561 is a deficient number, since it is larger than the sum of its proper divisors (1089439).

11195561 is a wasteful number, since it uses less digits than its factorization.

11195561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16315.

The product of its digits is 1350, while the sum is 29.

The square root of 11195561 is about 3345.9768379354. The cubic root of 11195561 is about 223.7082258186.

The spelling of 11195561 in words is "eleven million, one hundred ninety-five thousand, five hundred sixty-one".