161833812 has 48 divisors (see below), whose sum is σ = 456946560. Its totient is φ = 43517952.

The previous prime is 161833807. The next prime is 161833813. The reversal of 161833812 is 218338161.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161833813) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 55237 + ... + 58092.

It is an arithmetic number, because the mean of its divisors is an integer number (9519720).

Almost surely, 2^161833812 is an apocalyptic number.

161833812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

161833812 is an abundant number, since it is smaller than the sum of its proper divisors (295112748).

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

161833812 is a wasteful number, since it uses less digits than its factorization.

161833812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113360 (or 113358 counting only the distinct ones).

The product of its digits is 6912, while the sum is 33.

The square root of 161833812 is about 12721.3919049764. The cubic root of 161833812 is about 544.9497044179.

The spelling of 161833812 in words is "one hundred sixty-one million, eight hundred thirty-three thousand, eight hundred twelve".