2161665230 has 16 divisors (see below), whose sum is σ = 3894110640. Its totient is φ = 863974272.

The previous prime is 2161665227. The next prime is 2161665241. The reversal of 2161665230 is 325661612.

It is a congruent number.

It is an unprimeable number.

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, 73259 + ... + 98438.

It is an arithmetic number, because the mean of its divisors is an integer number (243381915).

Almost surely, 2^2161665230 is an apocalyptic number.

2161665230 is a deficient number, since it is larger than the sum of its proper divisors (1732445410).

2161665230 is a wasteful number, since it uses less digits than its factorization.

2161665230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172963.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 2161665230 is about 46493.7117253506. The cubic root of 2161665230 is about 1292.9929165862.

The spelling of 2161665230 in words is "two billion, one hundred sixty-one million, six hundred sixty-five thousand, two hundred thirty".