1115531223 has 4 divisors (see below), whose sum is σ = 1487374968. Its totient is φ = 743687480.

The previous prime is 1115531191. The next prime is 1115531237. The reversal of 1115531223 is 3221355111.

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 1115531223 - 2⁵ = 1115531191 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1115531193 and 1115531202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1115531243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 185921868 + ... + 185921873.

It is an arithmetic number, because the mean of its divisors is an integer number (371843742).

Almost surely, 2^1115531223 is an apocalyptic number.

1115531223 is a deficient number, since it is larger than the sum of its proper divisors (371843745).

1115531223 is an equidigital number, since it uses as much as digits as its factorization.

1115531223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371843744.

The product of its digits is 900, while the sum is 24.

The square root of 1115531223 is about 33399.5692038086. The cubic root of 1115531223 is about 1037.1157829834.

Adding to 1115531223 its reverse (3221355111), we get a palindrome (4336886334).

The spelling of 1115531223 in words is "one billion, one hundred fifteen million, five hundred thirty-one thousand, two hundred twenty-three".