1216432323 has 20 divisors (see below), whose sum is σ = 1847945880. Its totient is φ = 797206752.

The previous prime is 1216432271. The next prime is 1216432381. The reversal of 1216432323 is 3232346121.

1216432323 is a `hidden beast` number, since 12 + 1 + 643 + 2 + 3 + 2 + 3 = 666.

It is not a de Polignac number, because 1216432323 - 2⁸ = 1216432067 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1216432523) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 122490 + ... + 132047.

It is an arithmetic number, because the mean of its divisors is an integer number (92397294).

Almost surely, 2^1216432323 is an apocalyptic number.

1216432323 is a deficient number, since it is larger than the sum of its proper divisors (631513557).

1216432323 is an equidigital number, since it uses as much as digits as its factorization.

1216432323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254608 (or 254599 counting only the distinct ones).

The product of its digits is 5184, while the sum is 27.

The square root of 1216432323 is about 34877.3898536000. The cubic root of 1216432323 is about 1067.4871369799.

Adding to 1216432323 its reverse (3232346121), we get a palindrome (4448778444).

The spelling of 1216432323 in words is "one billion, two hundred sixteen million, four hundred thirty-two thousand, three hundred twenty-three".