1215342515 has 16 divisors (see below), whose sum is σ = 1504097760. Its totient is φ = 942036480.

The previous prime is 1215342511. The next prime is 1215342577. The reversal of 1215342515 is 5152435121.

It is not a de Polignac number, because 1215342515 - 2² = 1215342511 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1215342511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30956 + ... + 58214.

It is an arithmetic number, because the mean of its divisors is an integer number (94006110).

Almost surely, 2^1215342515 is an apocalyptic number.

1215342515 is a deficient number, since it is larger than the sum of its proper divisors (288755245).

1215342515 is a wasteful number, since it uses less digits than its factorization.

1215342515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27542.

The product of its digits is 6000, while the sum is 29.

The square root of 1215342515 is about 34861.7629359159. The cubic root of 1215342515 is about 1067.1682526513.

Adding to 1215342515 its reverse (5152435121), we get a palindrome (6367777636).

The spelling of 1215342515 in words is "one billion, two hundred fifteen million, three hundred forty-two thousand, five hundred fifteen".