2165615214 has 16 divisors (see below), whose sum is σ = 4949977728. Its totient is φ = 618747192.

The previous prime is 2165615201. The next prime is 2165615219. The reversal of 2165615214 is 4125165612.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2165615219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25781092 + ... + 25781175.

It is an arithmetic number, because the mean of its divisors is an integer number (309373608).

Almost surely, 2^2165615214 is an apocalyptic number.

2165615214 is an abundant number, since it is smaller than the sum of its proper divisors (2784362514).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2165615214 is a wasteful number, since it uses less digits than its factorization.

2165615214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51562279.

The product of its digits is 14400, while the sum is 33.

The square root of 2165615214 is about 46536.1710285666. The cubic root of 2165615214 is about 1293.7799940023.

The spelling of 2165615214 in words is "two billion, one hundred sixty-five million, six hundred fifteen thousand, two hundred fourteen".