161323200 has 252 divisors, whose sum is σ = 608030280. Its totient is φ = 40427520.

The previous prime is 161323189. The next prime is 161323241. The reversal of 161323200 is 2323161.

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

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 244471 + ... + 245129.

Almost surely, 2^161323200 is an apocalyptic number.

161323200 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 161323200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (304015140).

161323200 is an abundant number, since it is smaller than the sum of its proper divisors (446707080).

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

161323200 is a wasteful number, since it uses less digits than its factorization.

161323200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704 (or 686 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 161323200 is about 12701.3070193583. The cubic root of 161323200 is about 544.3759655955.

Adding to 161323200 its reverse (2323161), we get a palindrome (163646361).

The spelling of 161323200 in words is "one hundred sixty-one million, three hundred twenty-three thousand, two hundred".