1216332393 has 8 divisors (see below), whose sum is σ = 1621950048. Its totient is φ = 810801504.

The previous prime is 1216332389. The next prime is 1216332401. The reversal of 1216332393 is 3932336121.

1216332393 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1216332393 - 2² = 1216332389 is a prime.

It is a super-2 number, since 2×1216332393² = 2958928980522212898, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1216332323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26005 + ... + 55757.

It is an arithmetic number, because the mean of its divisors is an integer number (202743756).

Almost surely, 2^1216332393 is an apocalyptic number.

It is an amenable number.

1216332393 is a deficient number, since it is larger than the sum of its proper divisors (405617655).

1216332393 is a wasteful number, since it uses less digits than its factorization.

1216332393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43383.

The product of its digits is 17496, while the sum is 33.

The square root of 1216332393 is about 34875.9572341749. The cubic root of 1216332393 is about 1067.4579047985.

The spelling of 1216332393 in words is "one billion, two hundred sixteen million, three hundred thirty-two thousand, three hundred ninety-three".