1216541336 has 8 divisors (see below), whose sum is σ = 2281015020. Its totient is φ = 608270664.

The previous prime is 1216541321. The next prime is 1216541341. The reversal of 1216541336 is 6331456121.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76033826 + ... + 76033841.

Almost surely, 2^1216541336 is an apocalyptic number.

It is an amenable number.

1216541336 is a deficient number, since it is larger than the sum of its proper divisors (1064473684).

1216541336 is a wasteful number, since it uses less digits than its factorization.

1216541336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152067673 (or 152067669 counting only the distinct ones).

The product of its digits is 12960, while the sum is 32.

The square root of 1216541336 is about 34878.9526218893. The cubic root of 1216541336 is about 1067.5190243544.

Adding to 1216541336 its reverse (6331456121), we get a palindrome (7547997457).

The spelling of 1216541336 in words is "one billion, two hundred sixteen million, five hundred forty-one thousand, three hundred thirty-six".