1982216359 has 4 divisors (see below), whose sum is σ = 1982306704. Its totient is φ = 1982126016.

The previous prime is 1982216317. The next prime is 1982216389. The reversal of 1982216359 is 9536122891.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1982216359 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 (1982216389) 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, 11134 + ... + 63940.

It is an arithmetic number, because the mean of its divisors is an integer number (495576676).

Almost surely, 2^1982216359 is an apocalyptic number.

1982216359 is a deficient number, since it is larger than the sum of its proper divisors (90345).

1982216359 is an equidigital number, since it uses as much as digits as its factorization.

1982216359 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90344.

The product of its digits is 233280, while the sum is 46.

The square root of 1982216359 is about 44522.0884393354. The cubic root of 1982216359 is about 1256.1755959531.

The spelling of 1982216359 in words is "one billion, nine hundred eighty-two million, two hundred sixteen thousand, three hundred fifty-nine".