161317223 has 8 divisors (see below), whose sum is σ = 163758000. Its totient is φ = 158888448.

The previous prime is 161317171. The next prime is 161317231. The reversal of 161317223 is 322713161.

161317223 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 161317223 - 2¹² = 161313127 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161317192 and 161317201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161317243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26183 + ... + 31751.

It is an arithmetic number, because the mean of its divisors is an integer number (20469750).

Almost surely, 2^161317223 is an apocalyptic number.

161317223 is a deficient number, since it is larger than the sum of its proper divisors (2440777).

161317223 is an equidigital number, since it uses as much as digits as its factorization.

161317223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6001.

The product of its digits is 1512, while the sum is 26.

The square root of 161317223 is about 12701.0717264332. The cubic root of 161317223 is about 544.3692424970.

The spelling of 161317223 in words is "one hundred sixty-one million, three hundred seventeen thousand, two hundred twenty-three".