2116564831 has 8 divisors (see below), whose sum is σ = 2230726400. Its totient is φ = 2002679640.

The previous prime is 2116564829. The next prime is 2116564837. The reversal of 2116564831 is 1384656112.

It is a happy number.

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 2116564831 - 2¹ = 2116564829 is a prime.

It is a super-2 number, since 2×2116564831² = 8959693367652117122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2116564837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53271 + ... + 84088.

It is an arithmetic number, because the mean of its divisors is an integer number (278840800).

Almost surely, 2^2116564831 is an apocalyptic number.

2116564831 is a deficient number, since it is larger than the sum of its proper divisors (114161569).

2116564831 is a wasteful number, since it uses less digits than its factorization.

2116564831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138189.

The product of its digits is 34560, while the sum is 37.

The square root of 2116564831 is about 46006.1390577388. The cubic root of 2116564831 is about 1283.9374261859.

The spelling of 2116564831 in words is "two billion, one hundred sixteen million, five hundred sixty-four thousand, eight hundred thirty-one".