1216104343 has 4 divisors (see below), whose sum is σ = 1219007160. Its totient is φ = 1213201528.

The previous prime is 1216104289. The next prime is 1216104347. The reversal of 1216104343 is 3434016121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1216104343 - 2²¹ = 1214007191 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 (1216104347) 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, 1450780 + ... + 1451617.

It is an arithmetic number, because the mean of its divisors is an integer number (304751790).

Almost surely, 2^1216104343 is an apocalyptic number.

1216104343 is a deficient number, since it is larger than the sum of its proper divisors (2902817).

1216104343 is an equidigital number, since it uses as much as digits as its factorization.

1216104343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2902816.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 1216104343 is about 34872.6876366018. The cubic root of 1216104343 is about 1067.3911881148.

The spelling of 1216104343 in words is "one billion, two hundred sixteen million, one hundred four thousand, three hundred forty-three".