11223919249 has 3 divisors (see below), whose sum is σ = 11224025193. Its totient is φ = 11223813306.

The previous prime is 11223919243. The next prime is 11223919277. The reversal of 11223919249 is 94291932211.

The square root of 11223919249 is 105943.

It is a perfect power (a square), and thus also a powerful number.

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.

It is not a de Polignac number, because 11223919249 - 2⁷ = 11223919121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11223919243) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 52972 + ... + 158914.

It is an arithmetic number, because the mean of its divisors is an integer number (3741341731).

Almost surely, 2^11223919249 is an apocalyptic number.

11223919249 is the 105943-rd square number.

11223919249 is the 52972-nd centered octagonal number.

It is an amenable number.

11223919249 is a deficient number, since it is larger than the sum of its proper divisors (105944).

11223919249 is an frugal number, since it uses more digits than its factorization.

11223919249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211886 (or 105943 counting only the distinct ones).

The product of its digits is 69984, while the sum is 43.

The spelling of 11223919249 in words is "eleven billion, two hundred twenty-three million, nine hundred nineteen thousand, two hundred forty-nine".