220203161 has 4 divisors (see below), whose sum is σ = 220793892. Its totient is φ = 219612432.

The previous prime is 220203143. The next prime is 220203167. The reversal of 220203161 is 161302022.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 167857936 + 52345225 = 12956^2 + 7235^2 .

It is a cyclic number.

It is not a de Polignac number, because 220203161 - 2¹⁰ = 220202137 is a prime.

It is a super-2 number, since 2×220203161² = 96978864228783842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220203167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 294806 + ... + 295551.

It is an arithmetic number, because the mean of its divisors is an integer number (55198473).

Almost surely, 2^220203161 is an apocalyptic number.

It is an amenable number.

220203161 is a deficient number, since it is larger than the sum of its proper divisors (590731).

220203161 is an equidigital number, since it uses as much as digits as its factorization.

220203161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 590730.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 220203161 is about 14839.2439497435. The cubic root of 220203161 is about 603.8668414337.

Adding to 220203161 its reverse (161302022), we get a palindrome (381505183).

The spelling of 220203161 in words is "two hundred twenty million, two hundred three thousand, one hundred sixty-one".