2165552290 has 16 divisors (see below), whose sum is σ = 4252357440. Its totient is φ = 787473520.

The previous prime is 2165552273. The next prime is 2165552297. The reversal of 2165552290 is 922555612.

It is not an unprimeable number, because it can be changed into a prime (2165552297) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9843310 + ... + 9843529.

It is an arithmetic number, because the mean of its divisors is an integer number (265772340).

Almost surely, 2^2165552290 is an apocalyptic number.

2165552290 is a deficient number, since it is larger than the sum of its proper divisors (2086805150).

2165552290 is a wasteful number, since it uses less digits than its factorization.

2165552290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19686857.

The product of its (nonzero) digits is 54000, while the sum is 37.

The square root of 2165552290 is about 46535.4949474055. The cubic root of 2165552290 is about 1293.7674632134.

It can be divided in two parts, 21655522 and 90, that added together give a palindrome (21655612).

The spelling of 2165552290 in words is "two billion, one hundred sixty-five million, five hundred fifty-two thousand, two hundred ninety".