161541200 has 60 divisors (see below), whose sum is σ = 390058368. Its totient is φ = 64291200.

The previous prime is 161541199. The next prime is 161541227. The reversal of 161541200 is 2145161.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 88295 + ... + 90105.

Almost surely, 2^161541200 is an apocalyptic number.

161541200 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 161541200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (195029184).

161541200 is an abundant number, since it is smaller than the sum of its proper divisors (228517168).

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

161541200 is a wasteful number, since it uses less digits than its factorization.

161541200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2052 (or 2041 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 161541200 is about 12709.8859160891. The cubic root of 161541200 is about 544.6210647607.

Adding to 161541200 its reverse (2145161), we get a palindrome (163686361).

The spelling of 161541200 in words is "one hundred sixty-one million, five hundred forty-one thousand, two hundred".