161423222 has 12 divisors (see below), whose sum is σ = 250774836. Its totient is φ = 77927640.

The previous prime is 161423219. The next prime is 161423243. The reversal of 161423222 is 222324161.

It is a happy number.

It is a super-2 number, since 2×161423222² = 52114913201722568, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 46304 + ... + 49667.

It is an arithmetic number, because the mean of its divisors is an integer number (20897903).

Almost surely, 2^161423222 is an apocalyptic number.

161423222 is a deficient number, since it is larger than the sum of its proper divisors (89351614).

161423222 is an equidigital number, since it uses as much as digits as its factorization.

161423222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96031 (or 96002 counting only the distinct ones).

The product of its digits is 1152, while the sum is 23.

The square root of 161423222 is about 12705.2438780214. The cubic root of 161423222 is about 544.4884485358.

Adding to 161423222 its reverse (222324161), we get a palindrome (383747383).

The spelling of 161423222 in words is "one hundred sixty-one million, four hundred twenty-three thousand, two hundred twenty-two".