2116565155 has 8 divisors (see below), whose sum is σ = 2570479632. Its totient is φ = 1672851168.

The previous prime is 2116565141. The next prime is 2116565177. The reversal of 2116565155 is 5515656112.

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 2116565155 - 2¹⁵ = 2116532387 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2549664 + ... + 2550493.

It is an arithmetic number, because the mean of its divisors is an integer number (321309954).

Almost surely, 2^2116565155 is an apocalyptic number.

2116565155 is a deficient number, since it is larger than the sum of its proper divisors (453914477).

2116565155 is an equidigital number, since it uses as much as digits as its factorization.

2116565155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5100245.

The product of its digits is 45000, while the sum is 37.

The square root of 2116565155 is about 46006.1425790079. The cubic root of 2116565155 is about 1283.9374917002.

It can be divided in two parts, 211656 and 5155, that added together give a triangular number (216811 = T₆₅₈).

The spelling of 2116565155 in words is "two billion, one hundred sixteen million, five hundred sixty-five thousand, one hundred fifty-five".