220648705 has 8 divisors (see below), whose sum is σ = 268405992. Its totient is φ = 174100608.

The previous prime is 220648697. The next prime is 220648709. The reversal of 220648705 is 507846022.

It can be written as a sum of positive squares in 4 ways, for example, as 215296 + 220433409 = 464^2 + 14847^2 .

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 220648705 - 2³ = 220648697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220648709) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 301894 + ... + 302623.

It is an arithmetic number, because the mean of its divisors is an integer number (33550749).

Almost surely, 2^220648705 is an apocalyptic number.

It is an amenable number.

220648705 is a deficient number, since it is larger than the sum of its proper divisors (47757287).

220648705 is an equidigital number, since it uses as much as digits as its factorization.

220648705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 604595.

The product of its (nonzero) digits is 26880, while the sum is 34.

The square root of 220648705 is about 14854.2487188010. The cubic root of 220648705 is about 604.2738413330.

The spelling of 220648705 in words is "two hundred twenty million, six hundred forty-eight thousand, seven hundred five".