1216650241 has 4 divisors (see below), whose sum is σ = 1228020912. Its totient is φ = 1205279572.

The previous prime is 1216650223. The next prime is 1216650301. The reversal of 1216650241 is 1420566121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1216650241 - 2¹⁷ = 1216519169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1216650341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5685175 + ... + 5685388.

It is an arithmetic number, because the mean of its divisors is an integer number (307005228).

Almost surely, 2^1216650241 is an apocalyptic number.

It is an amenable number.

1216650241 is a deficient number, since it is larger than the sum of its proper divisors (11370671).

1216650241 is a wasteful number, since it uses less digits than its factorization.

1216650241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11370670.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 1216650241 is about 34880.5137720189. The cubic root of 1216650241 is about 1067.5508782358.

The spelling of 1216650241 in words is "one billion, two hundred sixteen million, six hundred fifty thousand, two hundred forty-one".