11189551 has 4 divisors (see below), whose sum is σ = 11196504. Its totient is φ = 11182600.

The previous prime is 11189539. The next prime is 11189567. The reversal of 11189551 is 15598111.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 15598111 = 283 ⋅55117.

It is a cyclic number.

It is not a de Polignac number, because 11189551 - 2⁹ = 11189039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11189531) 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, 321 + ... + 4741.

It is an arithmetic number, because the mean of its divisors is an integer number (2799126).

Almost surely, 2^11189551 is an apocalyptic number.

11189551 is a deficient number, since it is larger than the sum of its proper divisors (6953).

11189551 is an equidigital number, since it uses as much as digits as its factorization.

11189551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6952.

The product of its digits is 1800, while the sum is 31.

The square root of 11189551 is about 3345.0786238891. The cubic root of 11189551 is about 223.6681883105.

The spelling of 11189551 in words is "eleven million, one hundred eighty-nine thousand, five hundred fifty-one".