11213243 has 4 divisors (see below), whose sum is σ = 11371248. Its totient is φ = 11055240.

The previous prime is 11213233. The next prime is 11213281. The reversal of 11213243 is 34231211.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11213243 - 2⁸ = 11212987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11213233) 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, 78896 + ... + 79037.

It is an arithmetic number, because the mean of its divisors is an integer number (2842812).

Almost surely, 2^11213243 is an apocalyptic number.

11213243 is a deficient number, since it is larger than the sum of its proper divisors (158005).

11213243 is an equidigital number, since it uses as much as digits as its factorization.

11213243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158004.

The product of its digits is 144, while the sum is 17.

The square root of 11213243 is about 3348.6180731759. The cubic root of 11213243 is about 223.8259370022.

Adding to 11213243 its reverse (34231211), we get a palindrome (45444454).

The spelling of 11213243 in words is "eleven million, two hundred thirteen thousand, two hundred forty-three".