161500223 has 2 divisors, whose sum is σ = 161500224. Its totient is φ = 161500222.

The previous prime is 161500193. The next prime is 161500243. The reversal of 161500223 is 322005161.

It is an a-pointer prime, because the next prime (161500243) can be obtained adding 161500223 to its sum of digits (20).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 161500223 - 2¹⁰ = 161499199 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 161500195 and 161500204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161500243) 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 as a sum of consecutive naturals, namely, 80750111 + 80750112.

It is an arithmetic number, because the mean of its divisors is an integer number (80750112).

Almost surely, 2^161500223 is an apocalyptic number.

161500223 is a deficient number, since it is larger than the sum of its proper divisors (1).

161500223 is an equidigital number, since it uses as much as digits as its factorization.

161500223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 161500223 is about 12708.2738009535. The cubic root of 161500223 is about 544.5750108239.

Adding to 161500223 its reverse (322005161), we get a palindrome (483505384).

The spelling of 161500223 in words is "one hundred sixty-one million, five hundred thousand, two hundred twenty-three".