163220 has 12 divisors (see below), whose sum is σ = 342804. Its totient is φ = 65280.

The previous prime is 163211. The next prime is 163223. The reversal of 163220 is 22361.

It can be written as a sum of positive squares in 2 ways, for example, as 59536 + 103684 = 244^2 + 322^2 .

It is a junction number, because it is equal to n+sod(n) for n = 163195 and 163204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163223) 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, 4061 + ... + 4100.

It is an arithmetic number, because the mean of its divisors is an integer number (28567).

2¹⁶³²²⁰ is an apocalyptic number.

163220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

163220 is an abundant number, since it is smaller than the sum of its proper divisors (179584).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

163220 is a wasteful number, since it uses less digits than its factorization.

163220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8170 (or 8168 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 163220 is about 404.0049504647. The cubic root of 163220 is about 54.6501205791.

Adding to 163220 its reverse (22361), we get a palindrome (185581).

It can be divided in two parts, 1632 and 20, that multiplied together give a triangular number (32640 = T₂₅₅).

The spelling of 163220 in words is "one hundred sixty-three thousand, two hundred twenty".