2116530215 has 4 divisors (see below), whose sum is σ = 2539836264. Its totient is φ = 1693224168.

The previous prime is 2116530191. The next prime is 2116530223. The reversal of 2116530215 is 5120356112.

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 2116530215 - 2⁸ = 2116529959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 211653017 + ... + 211653026.

It is an arithmetic number, because the mean of its divisors is an integer number (634959066).

Almost surely, 2^2116530215 is an apocalyptic number.

2116530215 is a deficient number, since it is larger than the sum of its proper divisors (423306049).

2116530215 is an equidigital number, since it uses as much as digits as its factorization.

2116530215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423306048.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 2116530215 is about 46005.7628455393. The cubic root of 2116530215 is about 1283.9304266334.

Adding to 2116530215 its reverse (5120356112), we get a palindrome (7236886327).

The spelling of 2116530215 in words is "two billion, one hundred sixteen million, five hundred thirty thousand, two hundred fifteen".