1215153115 has 32 divisors (see below), whose sum is σ = 1705743360. Its totient is φ = 821184000.

The previous prime is 1215153077. The next prime is 1215153131. The reversal of 1215153115 is 5113515121.

1215153115 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1215153115 - 2²⁹ = 678282203 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1215153115.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 65640 + ... + 82090.

It is an arithmetic number, because the mean of its divisors is an integer number (53304480).

Almost surely, 2^1215153115 is an apocalyptic number.

1215153115 is a deficient number, since it is larger than the sum of its proper divisors (490590245).

1215153115 is a wasteful number, since it uses less digits than its factorization.

1215153115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16563.

The product of its digits is 750, while the sum is 25.

The square root of 1215153115 is about 34859.0463868420. The cubic root of 1215153115 is about 1067.1128136386.

Adding to 1215153115 its reverse (5113515121), we get a palindrome (6328668236).

The spelling of 1215153115 in words is "one billion, two hundred fifteen million, one hundred fifty-three thousand, one hundred fifteen".