161205830 has 8 divisors (see below), whose sum is σ = 290170512. Its totient is φ = 64482328.

The previous prime is 161205829. The next prime is 161205833. The reversal of 161205830 is 38502161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 161205830.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161205833) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8060282 + ... + 8060301.

It is an arithmetic number, because the mean of its divisors is an integer number (36271314).

Almost surely, 2^161205830 is an apocalyptic number.

161205830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161205830 is a deficient number, since it is larger than the sum of its proper divisors (128964682).

161205830 is a wasteful number, since it uses less digits than its factorization.

161205830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16120590.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 161205830 is about 12696.6857880315. The cubic root of 161205830 is about 544.2439141021.

Adding to 161205830 its reverse (38502161), we get a palindrome (199707991).

The spelling of 161205830 in words is "one hundred sixty-one million, two hundred five thousand, eight hundred thirty".