161117204 has 12 divisors (see below), whose sum is σ = 282309300. Its totient is φ = 80457408.

The previous prime is 161117189. The next prime is 161117213. The reversal of 161117204 is 402711161.

It is a happy number.

161117204 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 89680900 + 71436304 = 9470^2 + 8452^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 161117204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21659 + ... + 28130.

It is an arithmetic number, because the mean of its divisors is an integer number (23525775).

Almost surely, 2^161117204 is an apocalyptic number.

It is an amenable number.

161117204 is a deficient number, since it is larger than the sum of its proper divisors (121192096).

161117204 is a wasteful number, since it uses less digits than its factorization.

161117204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50602 (or 50600 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 23.

The square root of 161117204 is about 12693.1951848225. The cubic root of 161117204 is about 544.1441596390.

Adding to 161117204 its reverse (402711161), we get a palindrome (563828365).

The spelling of 161117204 in words is "one hundred sixty-one million, one hundred seventeen thousand, two hundred four".