1215304216 has 32 divisors (see below), whose sum is σ = 2607344640. Its totient is φ = 520220448.

The previous prime is 1215304169. The next prime is 1215304241. The reversal of 1215304216 is 6124035121.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35755 + ... + 60901.

It is an arithmetic number, because the mean of its divisors is an integer number (81479520).

Almost surely, 2^1215304216 is an apocalyptic number.

It is an amenable number.

1215304216 is an abundant number, since it is smaller than the sum of its proper divisors (1392040424).

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

1215304216 is a wasteful number, since it uses less digits than its factorization.

1215304216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26023 (or 26019 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 1215304216 is about 34861.2136334925. The cubic root of 1215304216 is about 1067.1570426685.

Adding to 1215304216 its reverse (6124035121), we get a palindrome (7339339337).

The spelling of 1215304216 in words is "one billion, two hundred fifteen million, three hundred four thousand, two hundred sixteen".