1216632343 has 8 divisors (see below), whose sum is σ = 1232090496. Its totient is φ = 1201193400.

The previous prime is 1216632317. The next prime is 1216632349. The reversal of 1216632343 is 3432366121.

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

It is a cyclic number.

It is not a de Polignac number, because 1216632343 - 2²⁵ = 1183077911 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216632349) 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, 156478 + ... + 164068.

It is an arithmetic number, because the mean of its divisors is an integer number (154011312).

Almost surely, 2^1216632343 is an apocalyptic number.

1216632343 is a deficient number, since it is larger than the sum of its proper divisors (15458153).

1216632343 is an equidigital number, since it uses as much as digits as its factorization.

1216632343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9605.

The product of its digits is 15552, while the sum is 31.

The square root of 1216632343 is about 34880.2572094874. The cubic root of 1216632343 is about 1067.5456433379.

Adding to 1216632343 its reverse (3432366121), we get a palindrome (4648998464).

The spelling of 1216632343 in words is "one billion, two hundred sixteen million, six hundred thirty-two thousand, three hundred forty-three".