2216210705 has 8 divisors (see below), whose sum is σ = 2659782312. Its totient is φ = 1772748928.

The previous prime is 2216210699. The next prime is 2216210713. The reversal of 2216210705 is 5070126122.

It can be written as a sum of positive squares in 4 ways, for example, as 287946961 + 1928263744 = 16969^2 + 43912^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2216210705 - 2⁶ = 2216210641 is a prime.

It is a Duffinian 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, 26627 + ... + 71703.

It is an arithmetic number, because the mean of its divisors is an integer number (332472789).

Almost surely, 2^2216210705 is an apocalyptic number.

It is an amenable number.

2216210705 is a deficient number, since it is larger than the sum of its proper divisors (443571607).

2216210705 is an equidigital number, since it uses as much as digits as its factorization.

2216210705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54915.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 2216210705 is about 47076.6471299731. The cubic root of 2216210705 is about 1303.7781030036.

Adding to 2216210705 its reverse (5070126122), we get a palindrome (7286336827).

The spelling of 2216210705 in words is "two billion, two hundred sixteen million, two hundred ten thousand, seven hundred five".