2144664221 has 8 divisors (see below), whose sum is σ = 2468679360. Its totient is φ = 1825057728.

The previous prime is 2144664211. The next prime is 2144664241. The reversal of 2144664221 is 1224664412.

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 2144664221 - 2²² = 2140469917 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2144664211) 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, 1101116 + ... + 1103061.

It is an arithmetic number, because the mean of its divisors is an integer number (308584920).

Almost surely, 2^2144664221 is an apocalyptic number.

It is an amenable number.

2144664221 is a deficient number, since it is larger than the sum of its proper divisors (324015139).

2144664221 is a wasteful number, since it uses less digits than its factorization.

2144664221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2204323.

The product of its digits is 18432, while the sum is 32.

The square root of 2144664221 is about 46310.5195500979. The cubic root of 2144664221 is about 1289.5942920235.

The spelling of 2144664221 in words is "two billion, one hundred forty-four million, six hundred sixty-four thousand, two hundred twenty-one".