161243206 has 8 divisors (see below), whose sum is σ = 247489704. Its totient is φ = 78746640.

The previous prime is 161243171. The next prime is 161243207. The reversal of 161243206 is 602342161.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161243207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 937375 + ... + 937546.

It is an arithmetic number, because the mean of its divisors is an integer number (30936213).

Almost surely, 2^161243206 is an apocalyptic number.

161243206 is a deficient number, since it is larger than the sum of its proper divisors (86246498).

161243206 is a wasteful number, since it uses less digits than its factorization.

161243206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1874966.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 161243206 is about 12698.1575828937. The cubic root of 161243206 is about 544.2859723176.

Adding to 161243206 its reverse (602342161), we get a palindrome (763585367).

The spelling of 161243206 in words is "one hundred sixty-one million, two hundred forty-three thousand, two hundred six".