2217328785 has 288 divisors, whose sum is σ = 5203740672. Its totient is φ = 851005440.

The previous prime is 2217328783. The next prime is 2217328807. The reversal of 2217328785 is 5878237122.

2217328785 is a `hidden beast` number, since 221 + 73 + 287 + 85 = 666.

It is not a de Polignac number, because 2217328785 - 2¹ = 2217328783 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 2217328785.

It is not an unprimeable number, because it can be changed into a prime (2217328783) by changing a digit.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 59927787 + ... + 59927823.

It is an arithmetic number, because the mean of its divisors is an integer number (18068544).

Almost surely, 2^2217328785 is an apocalyptic number.

It is an amenable number.

2217328785 is an abundant number, since it is smaller than the sum of its proper divisors (2986411887).

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

2217328785 is a wasteful number, since it uses less digits than its factorization.

2217328785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141 (or 119 counting only the distinct ones).

The product of its digits is 376320, while the sum is 45.

The square root of 2217328785 is about 47088.5207348882. The cubic root of 2217328785 is about 1303.9973184938.

The spelling of 2217328785 in words is "two billion, two hundred seventeen million, three hundred twenty-eight thousand, seven hundred eighty-five".