161200050 has 96 divisors (see below), whose sum is σ = 439686144. Its totient is φ = 38760000.

The previous prime is 161200049. The next prime is 161200063. The reversal of 161200050 is 50002161.

It is a super-2 number, since 2×161200050² = 51970912240005000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 248827 + ... + 249473.

It is an arithmetic number, because the mean of its divisors is an integer number (4580064).

Almost surely, 2^161200050 is an apocalyptic number.

161200050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 161200050, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (219843072).

161200050 is an abundant number, since it is smaller than the sum of its proper divisors (278486094).

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

161200050 is a wasteful number, since it uses less digits than its factorization.

161200050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 824 (or 819 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 161200050 is about 12696.4581675363. The cubic root of 161200050 is about 544.2374094419.

Subtracting from 161200050 its product of nonzero digits (60), we obtain a triangular number (161199990 = T₁₇₉₅₅).

The spelling of 161200050 in words is "one hundred sixty-one million, two hundred thousand, fifty".