161204223 has 8 divisors (see below), whose sum is σ = 215107200. Its totient is φ = 107385368.

The previous prime is 161204213. The next prime is 161204231. The reversal of 161204223 is 322402161.

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 161204223 - 2⁶ = 161204159 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 161204223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161204213) 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, 16413 + ... + 24326.

It is an arithmetic number, because the mean of its divisors is an integer number (26888400).

Almost surely, 2^161204223 is an apocalyptic number.

161204223 is a deficient number, since it is larger than the sum of its proper divisors (53902977).

161204223 is a wasteful number, since it uses less digits than its factorization.

161204223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42061.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 161204223 is about 12696.6225036425. The cubic root of 161204223 is about 544.2421056421.

Adding to 161204223 its reverse (322402161), we get a palindrome (483606384).

The spelling of 161204223 in words is "one hundred sixty-one million, two hundred four thousand, two hundred twenty-three".