161130000 has 200 divisors, whose sum is σ = 536903136. Its totient is φ = 41600000.

The previous prime is 161129999. The next prime is 161130023. The reversal of 161130000 is 31161.

It is a tau number, because it is divible by the number of its divisors (200).

It is a Harshad number since it is a multiple of its sum of digits (12).

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 39 ways as a sum of consecutive naturals, for example, 1229935 + ... + 1230065.

Almost surely, 2^161130000 is an apocalyptic number.

161130000 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 161130000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (268451568).

161130000 is an abundant number, since it is smaller than the sum of its proper divisors (375773136).

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

161130000 is a wasteful number, since it uses less digits than its factorization.

161130000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203 (or 182 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 161130000 is about 12693.6992244184. The cubic root of 161130000 is about 544.1585646480.

Adding to 161130000 its reverse (31161), we get a palindrome (161161161).

The spelling of 161130000 in words is "one hundred sixty-one million, one hundred thirty thousand".