161222 has 4 divisors (see below), whose sum is σ = 241836. Its totient is φ = 80610.

The previous prime is 161221. The next prime is 161233. The reversal of 161222 is 222161.

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

It is a super-3 number, since 3×161222³ = 12571704603339144, which contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161197 and 161206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40304 + ... + 40307.

It is an arithmetic number, because the mean of its divisors is an integer number (60459).

2¹⁶¹²²² is an apocalyptic number.

161222 is a deficient number, since it is larger than the sum of its proper divisors (80614).

161222 is an equidigital number, since it uses as much as digits as its factorization.

161222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80613.

The product of its digits is 48, while the sum is 14.

The square root of 161222 is about 401.5245945145. The cubic root of 161222 is about 54.4262110569.

Adding to 161222 its reverse (222161), we get a palindrome (383383).

It can be divided in two parts, 161 and 222, that added together give a palindrome (383).

The spelling of 161222 in words is "one hundred sixty-one thousand, two hundred twenty-two".