1215252316 has 12 divisors (see below), whose sum is σ = 2155824832. Its totient is φ = 599302368.

The previous prime is 1215252307. The next prime is 1215252319. The reversal of 1215252316 is 6132525121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215252319) 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, 2080620 + ... + 2081203.

Almost surely, 2^1215252316 is an apocalyptic number.

It is an amenable number.

1215252316 is a deficient number, since it is larger than the sum of its proper divisors (940572516).

1215252316 is a wasteful number, since it uses less digits than its factorization.

1215252316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4161900 (or 4161898 counting only the distinct ones).

The product of its digits is 3600, while the sum is 28.

The square root of 1215252316 is about 34860.4692452640. The cubic root of 1215252316 is about 1067.1418513449.

Adding to 1215252316 its reverse (6132525121), we get a palindrome (7347777437).

The spelling of 1215252316 in words is "one billion, two hundred fifteen million, two hundred fifty-two thousand, three hundred sixteen".