11198555 has 4 divisors (see below), whose sum is σ = 13438272. Its totient is φ = 8958840.

The previous prime is 11198507. The next prime is 11198557. The reversal of 11198555 is 55589111.

11198555 is digitally balanced in base 2, because in such base 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 an emirpimes, since its reverse is a distinct semiprime: 55589111 = 4007 ⋅13873.

It is not a de Polignac number, because 11198555 - 2⁶ = 11198491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11198557) 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, 1119851 + ... + 1119860.

It is an arithmetic number, because the mean of its divisors is an integer number (3359568).

Almost surely, 2^11198555 is an apocalyptic number.

11198555 is a deficient number, since it is larger than the sum of its proper divisors (2239717).

11198555 is an equidigital number, since it uses as much as digits as its factorization.

11198555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2239716.

The product of its digits is 9000, while the sum is 35.

The square root of 11198555 is about 3346.4242110049. The cubic root of 11198555 is about 223.7281659458.

The spelling of 11198555 in words is "eleven million, one hundred ninety-eight thousand, five hundred fifty-five".