181284216 has 32 divisors (see below), whose sum is σ = 463752960. Its totient is φ = 59022432.

The previous prime is 181284163. The next prime is 181284239. The reversal of 181284216 is 612482181.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86800 + ... + 88863.

It is an arithmetic number, because the mean of its divisors is an integer number (14492280).

Almost surely, 2^181284216 is an apocalyptic number.

It is an amenable number.

181284216 is an abundant number, since it is smaller than the sum of its proper divisors (282468744).

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

181284216 is a wasteful number, since it uses less digits than its factorization.

181284216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175715 (or 175711 counting only the distinct ones).

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

The square root of 181284216 is about 13464.1827082077. The cubic root of 181284216 is about 565.9612071620.

The spelling of 181284216 in words is "one hundred eighty-one million, two hundred eighty-four thousand, two hundred sixteen".