1115222521 has 8 divisors (see below), whose sum is σ = 1318489920. Its totient is φ = 922942608.

The previous prime is 1115222503. The next prime is 1115222531. The reversal of 1115222521 is 1252225111.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1115222521 - 2¹¹ = 1115220473 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1115222492 and 1115222501.

It is not an unprimeable number, because it can be changed into a prime (1115222531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2746651 + ... + 2747056.

It is an arithmetic number, because the mean of its divisors is an integer number (164811240).

Almost surely, 2^1115222521 is an apocalyptic number.

It is an amenable number.

1115222521 is a deficient number, since it is larger than the sum of its proper divisors (203267399).

1115222521 is an equidigital number, since it uses as much as digits as its factorization.

1115222521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5493743.

The product of its digits is 400, while the sum is 22.

The square root of 1115222521 is about 33394.9475370152. The cubic root of 1115222521 is about 1037.0201068167.

Adding to 1115222521 its reverse (1252225111), we get a palindrome (2367447632).

The spelling of 1115222521 in words is "one billion, one hundred fifteen million, two hundred twenty-two thousand, five hundred twenty-one".