220819605 has 16 divisors (see below), whose sum is σ = 358586304. Its totient is φ = 116012160.

The previous prime is 220819597. The next prime is 220819607. The reversal of 220819605 is 506918022.

It is not a de Polignac number, because 220819605 - 2³ = 220819597 is a prime.

It is a super-2 number, since 2×220819605² = 97522595904712050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220819607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108856 + ... + 110865.

It is an arithmetic number, because the mean of its divisors is an integer number (22411644).

Almost surely, 2^220819605 is an apocalyptic number.

It is an amenable number.

220819605 is a deficient number, since it is larger than the sum of its proper divisors (137766699).

220819605 is a wasteful number, since it uses less digits than its factorization.

220819605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219796.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 220819605 is about 14860.0001682369. Note that the first 3 decimals coincide. The cubic root of 220819605 is about 604.4298113530.

The spelling of 220819605 in words is "two hundred twenty million, eight hundred nineteen thousand, six hundred five".