2217199920 has 80 divisors (see below), whose sum is σ = 7402047072. Its totient is φ = 545771520.

The previous prime is 2217199913. The next prime is 2217199973. The reversal of 2217199920 is 299917122.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 352201 + ... + 358440.

Almost surely, 2^2217199920 is an apocalyptic number.

2217199920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2217199920 is an abundant number, since it is smaller than the sum of its proper divisors (5184847152).

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

2217199920 is a wasteful number, since it uses less digits than its factorization.

2217199920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 710670 (or 710664 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 42.

The square root of 2217199920 is about 47087.1523878860. The cubic root of 2217199920 is about 1303.9720564351.

The spelling of 2217199920 in words is "two billion, two hundred seventeen million, one hundred ninety-nine thousand, nine hundred twenty".