161097200 has 240 divisors, whose sum is σ = 464970240. Its totient is φ = 52992000.

The previous prime is 161097197. The next prime is 161097227. The reversal of 161097200 is 2790161.

It is a self number, because there is not a number n which added to its sum of digits gives 161097200.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3427577 + ... + 3427623.

It is an arithmetic number, because the mean of its divisors is an integer number (1937376).

Almost surely, 2^161097200 is an apocalyptic number.

161097200 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 161097200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (232485120).

161097200 is an abundant number, since it is smaller than the sum of its proper divisors (303873040).

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

161097200 is a wasteful number, since it uses less digits than its factorization.

161097200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136 (or 125 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 26.

The square root of 161097200 is about 12692.4071790973. The cubic root of 161097200 is about 544.1216387453.

The spelling of 161097200 in words is "one hundred sixty-one million, ninety-seven thousand, two hundred".