161206200 has 288 divisors, whose sum is σ = 584962560. Its totient is φ = 41212800.

The previous prime is 161206163. The next prime is 161206211. The reversal of 161206200 is 2602161.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1506547 + ... + 1506653.

It is an arithmetic number, because the mean of its divisors is an integer number (2031120).

Almost surely, 2^161206200 is an apocalyptic number.

161206200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161206200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (292481280).

161206200 is an abundant number, since it is smaller than the sum of its proper divisors (423756360).

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

161206200 is a wasteful number, since it uses less digits than its factorization.

161206200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169 (or 148 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 161206200 is about 12696.7003587546. The cubic root of 161206200 is about 544.2443304851.

Adding to 161206200 its reverse (2602161), we get a palindrome (163808361).

The spelling of 161206200 in words is "one hundred sixty-one million, two hundred six thousand, two hundred".