161940200 has 24 divisors (see below), whose sum is σ = 376511430. Its totient is φ = 64776000.

The previous prime is 161940199. The next prime is 161940209. The reversal of 161940200 is 2049161.

It is a happy number.

161940200 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 3 ways, for example, as 108035236 + 53904964 = 10394^2 + 7342^2 .

It is not an unprimeable number, because it can be changed into a prime (161940209) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 404651 + ... + 405050.

Almost surely, 2^161940200 is an apocalyptic number.

161940200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161940200 is an abundant number, since it is smaller than the sum of its proper divisors (214571230).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161940200 is a wasteful number, since it uses less digits than its factorization.

161940200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 809717 (or 809708 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 161940200 is about 12725.5726786656. The cubic root of 161940200 is about 545.0690931677.

Adding to 161940200 its reverse (2049161), we get a palindrome (163989361).

The spelling of 161940200 in words is "one hundred sixty-one million, nine hundred forty thousand, two hundred".