161032223 has 16 divisors (see below), whose sum is σ = 183810816. Its totient is φ = 139645440.

The previous prime is 161032219. The next prime is 161032229. The reversal of 161032223 is 322230161.

It is a happy number.

It is not a de Polignac number, because 161032223 - 2² = 161032219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161032195 and 161032204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161032229) 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 15 ways as a sum of consecutive naturals, for example, 131711 + ... + 132927.

It is an arithmetic number, because the mean of its divisors is an integer number (11488176).

Almost surely, 2^161032223 is an apocalyptic number.

161032223 is a deficient number, since it is larger than the sum of its proper divisors (22778593).

161032223 is a wasteful number, since it uses less digits than its factorization.

161032223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1774.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 161032223 is about 12689.8472410033. The cubic root of 161032223 is about 544.0484735046.

Adding to 161032223 its reverse (322230161), we get a palindrome (483262384).

It can be divided in two parts, 1610 and 32223, that added together give a palindrome (33833).

The spelling of 161032223 in words is "one hundred sixty-one million, thirty-two thousand, two hundred twenty-three".