2217089664 has 64 divisors (see below), whose sum is σ = 6543504000. Its totient is φ = 739028736.

The previous prime is 2217089659. The next prime is 2217089671. The reversal of 2217089664 is 4669807122.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

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, 317304 + ... + 324215.

It is an arithmetic number, because the mean of its divisors is an integer number (102242250).

Almost surely, 2^2217089664 is an apocalyptic number.

2217089664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2217089664 is an abundant number, since it is smaller than the sum of its proper divisors (4326414336).

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

2217089664 is an equidigital number, since it uses as much as digits as its factorization.

2217089664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641542 (or 641524 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 2217089664 is about 47085.9816081177. The cubic root of 2217089664 is about 1303.9504416159.

The spelling of 2217089664 in words is "two billion, two hundred seventeen million, eighty-nine thousand, six hundred sixty-four".