220420173 has 16 divisors (see below), whose sum is σ = 298388160. Its totient is φ = 144716544.

The previous prime is 220420169. The next prime is 220420219. The reversal of 220420173 is 371024022.

It is not a de Polignac number, because 220420173 - 2² = 220420169 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220420073) 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, 53263 + ... + 57251.

It is an arithmetic number, because the mean of its divisors is an integer number (18649260).

Almost surely, 2^220420173 is an apocalyptic number.

It is an amenable number.

220420173 is a deficient number, since it is larger than the sum of its proper divisors (77967987).

220420173 is a wasteful number, since it uses less digits than its factorization.

220420173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4268.

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 220420173 is about 14846.5542466931. The cubic root of 220420173 is about 604.0651481926.

Adding to 220420173 its reverse (371024022), we get a palindrome (591444195).

The spelling of 220420173 in words is "two hundred twenty million, four hundred twenty thousand, one hundred seventy-three".