11515223 has 4 divisors (see below), whose sum is σ = 11687160. Its totient is φ = 11343288.

The previous prime is 11515201. The next prime is 11515243. The reversal of 11515223 is 32251511.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11515223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11515195 and 11515204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11515243) 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, 85868 + ... + 86001.

It is an arithmetic number, because the mean of its divisors is an integer number (2921790).

Almost surely, 2^11515223 is an apocalyptic number.

11515223 is a deficient number, since it is larger than the sum of its proper divisors (171937).

11515223 is an equidigital number, since it uses as much as digits as its factorization.

11515223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171936.

The product of its digits is 300, while the sum is 20.

The square root of 11515223 is about 3393.4087581663. The cubic root of 11515223 is about 225.8174250522.

Adding to 11515223 its reverse (32251511), we get a palindrome (43766734).

The spelling of 11515223 in words is "eleven million, five hundred fifteen thousand, two hundred twenty-three".