2144664220 has 24 divisors (see below), whose sum is σ = 4523644944. Its totient is φ = 854084736.

The previous prime is 2144664211. The next prime is 2144664241. The reversal of 2144664220 is 224664412.

It is a happy number.

It is a congruent 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, 231657 + ... + 240736.

It is an arithmetic number, because the mean of its divisors is an integer number (188485206).

Almost surely, 2^2144664220 is an apocalyptic number.

2144664220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2144664220 is an abundant number, since it is smaller than the sum of its proper divisors (2378980724).

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

2144664220 is a wasteful number, since it uses less digits than its factorization.

2144664220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 472629 (or 472627 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 31.

The square root of 2144664220 is about 46310.5195393012. The cubic root of 2144664220 is about 1289.5942918230.

The spelling of 2144664220 in words is "two billion, one hundred forty-four million, six hundred sixty-four thousand, two hundred twenty".