161322800 has 60 divisors (see below), whose sum is σ = 395870496. Its totient is φ = 63148800.

The previous prime is 161322779. The next prime is 161322803. The reversal of 161322800 is 8223161.

161322800 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (161322803) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14510 + ... + 23090.

Almost surely, 2^161322800 is an apocalyptic number.

161322800 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 161322800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (197935248).

161322800 is an abundant number, since it is smaller than the sum of its proper divisors (234547696).

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

161322800 is a wasteful number, since it uses less digits than its factorization.

161322800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8646 (or 8635 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 161322800 is about 12701.2912729376. The cubic root of 161322800 is about 544.3755156694.

Adding to 161322800 its reverse (8223161), we get a palindrome (169545961).

The spelling of 161322800 in words is "one hundred sixty-one million, three hundred twenty-two thousand, eight hundred".