1215320216 has 16 divisors (see below), whose sum is σ = 2485882440. Its totient is φ = 552418240.

The previous prime is 1215320213. The next prime is 1215320251. The reversal of 1215320216 is 6120235121.

It is a junction number, because it is equal to n+sod(n) for n = 1215320191 and 1215320200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215320213) 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, 6905141 + ... + 6905316.

Almost surely, 2^1215320216 is an apocalyptic number.

It is an amenable number.

1215320216 is an abundant number, since it is smaller than the sum of its proper divisors (1270562224).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1215320216 is a wasteful number, since it uses less digits than its factorization.

1215320216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13810474 (or 13810470 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 1215320216 is about 34861.4431141340. The cubic root of 1215320216 is about 1067.1617258410.

Adding to 1215320216 its reverse (6120235121), we get a palindrome (7335555337).

The spelling of 1215320216 in words is "one billion, two hundred fifteen million, three hundred twenty thousand, two hundred sixteen".