161223227 has 8 divisors (see below), whose sum is σ = 185136960. Its totient is φ = 138852360.

The previous prime is 161223221. The next prime is 161223247. The reversal of 161223227 is 722322161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161223227 - 2⁶ = 161223163 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161223196 and 161223205.

It is not an unprimeable number, because it can be changed into a prime (161223221) 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 7 ways as a sum of consecutive naturals, for example, 385493 + ... + 385910.

It is an arithmetic number, because the mean of its divisors is an integer number (23142120).

Almost surely, 2^161223227 is an apocalyptic number.

161223227 is a deficient number, since it is larger than the sum of its proper divisors (23913733).

161223227 is a wasteful number, since it uses less digits than its factorization.

161223227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 771433.

The product of its digits is 2016, while the sum is 26.

The square root of 161223227 is about 12697.3708695934. The cubic root of 161223227 is about 544.2634912906.

Adding to 161223227 its reverse (722322161), we get a palindrome (883545388).

The spelling of 161223227 in words is "one hundred sixty-one million, two hundred twenty-three thousand, two hundred twenty-seven".