1216241164 has 12 divisors (see below), whose sum is σ = 2154066264. Its totient is φ = 600793664.

The previous prime is 1216241141. The next prime is 1216241177. The reversal of 1216241164 is 4611426121.

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, 1831357 + ... + 1832020.

It is an arithmetic number, because the mean of its divisors is an integer number (179505522).

Almost surely, 2^1216241164 is an apocalyptic number.

It is an amenable number.

1216241164 is a deficient number, since it is larger than the sum of its proper divisors (937825100).

1216241164 is a wasteful number, since it uses less digits than its factorization.

1216241164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3663464 (or 3663462 counting only the distinct ones).

The product of its digits is 2304, while the sum is 28.

The square root of 1216241164 is about 34874.6493028962. The cubic root of 1216241164 is about 1067.4312164929.

Adding to 1216241164 its reverse (4611426121), we get a palindrome (5827667285).

The spelling of 1216241164 in words is "one billion, two hundred sixteen million, two hundred forty-one thousand, one hundred sixty-four".