2213661220 has 24 divisors (see below), whose sum is σ = 4850806464. Its totient is φ = 846965856.

The previous prime is 2213661209. The next prime is 2213661283. The reversal of 2213661220 is 221663122.

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, 2405694 + ... + 2406613.

It is an arithmetic number, because the mean of its divisors is an integer number (202116936).

Almost surely, 2^2213661220 is an apocalyptic number.

2213661220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2213661220 is an abundant number, since it is smaller than the sum of its proper divisors (2637145244).

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

2213661220 is a wasteful number, since it uses less digits than its factorization.

2213661220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4812339 (or 4812337 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 2213661220 is about 47049.5613157020. The cubic root of 2213661220 is about 1303.2779643162.

The spelling of 2213661220 in words is "two billion, two hundred thirteen million, six hundred sixty-one thousand, two hundred twenty".