1236215216 has 20 divisors (see below), whose sum is σ = 2417144400. Its totient is φ = 612436032.

The previous prime is 1236215209. The next prime is 1236215237. The reversal of 1236215216 is 6125126321.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 352676 + ... + 356163.

It is an arithmetic number, because the mean of its divisors is an integer number (120857220).

Almost surely, 2^1236215216 is an apocalyptic number.

1236215216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1236215216 is a deficient number, since it is larger than the sum of its proper divisors (1180929184).

1236215216 is a wasteful number, since it uses less digits than its factorization.

1236215216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 708956 (or 708950 counting only the distinct ones).

The product of its digits is 4320, while the sum is 29.

The square root of 1236215216 is about 35159.8523318856. The cubic root of 1236215216 is about 1073.2429103084.

The spelling of 1236215216 in words is "one billion, two hundred thirty-six million, two hundred fifteen thousand, two hundred sixteen".