1216330156 has 12 divisors (see below), whose sum is σ = 2186107168. Its totient is φ = 591728112.

The previous prime is 1216330111. The next prime is 1216330177. The reversal of 1216330156 is 6510336121.

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, 4109076 + ... + 4109371.

Almost surely, 2^1216330156 is an apocalyptic number.

It is an amenable number.

1216330156 is a deficient number, since it is larger than the sum of its proper divisors (969777012).

1216330156 is a wasteful number, since it uses less digits than its factorization.

1216330156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8218488 (or 8218486 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 1216330156 is about 34875.9251633559. The cubic root of 1216330156 is about 1067.4572503982.

Adding to 1216330156 its reverse (6510336121), we get a palindrome (7726666277).

The spelling of 1216330156 in words is "one billion, two hundred sixteen million, three hundred thirty thousand, one hundred fifty-six".