161884212 has 48 divisors (see below), whose sum is σ = 450465792. Its totient is φ = 44241120.

The previous prime is 161884187. The next prime is 161884243. The reversal of 161884212 is 212488161.

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 15 ways as a sum of consecutive naturals, for example, 39964 + ... + 43827.

It is an arithmetic number, because the mean of its divisors is an integer number (9384704).

Almost surely, 2^161884212 is an apocalyptic number.

161884212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

161884212 is an abundant number, since it is smaller than the sum of its proper divisors (288581580).

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

161884212 is a wasteful number, since it uses less digits than its factorization.

161884212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83828 (or 83826 counting only the distinct ones).

The product of its digits is 6144, while the sum is 33.

The square root of 161884212 is about 12723.3726660819. The cubic root of 161884212 is about 545.0062698827.

The spelling of 161884212 in words is "one hundred sixty-one million, eight hundred eighty-four thousand, two hundred twelve".