161243200 has 84 divisors (see below), whose sum is σ = 399684240. Its totient is φ = 64023040.

The previous prime is 161243171. The next prime is 161243207. The reversal of 161243200 is 2342161.

It is not an unprimeable number, because it can be changed into a prime (161243207) 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, 286119 + ... + 286681.

Almost surely, 2^161243200 is an apocalyptic number.

161243200 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 161243200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (199842120).

161243200 is an abundant number, since it is smaller than the sum of its proper divisors (238441040).

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

161243200 is a wasteful number, since it uses less digits than its factorization.

161243200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 764 (or 749 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 161243200 is about 12698.1573466389. The cubic root of 161243200 is about 544.2859655665.

Adding to 161243200 its reverse (2342161), we get a palindrome (163585361).

The spelling of 161243200 in words is "one hundred sixty-one million, two hundred forty-three thousand, two hundred".