220706905 has 16 divisors (see below), whose sum is σ = 270325440. Its totient is φ = 172936512.

The previous prime is 220706861. The next prime is 220706923. The reversal of 220706905 is 509607022.

It is a cyclic number.

It is not a de Polignac number, because 220706905 - 2²³ = 212318297 is a prime.

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, 89347 + ... + 91783.

It is an arithmetic number, because the mean of its divisors is an integer number (16895340).

Almost surely, 2^220706905 is an apocalyptic number.

It is an amenable number.

220706905 is a deficient number, since it is larger than the sum of its proper divisors (49618535).

220706905 is a wasteful number, since it uses less digits than its factorization.

220706905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2808.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 220706905 is about 14856.2076250973. The cubic root of 220706905 is about 604.3269659683.

The spelling of 220706905 in words is "two hundred twenty million, seven hundred six thousand, nine hundred five".