182721216 has 56 divisors (see below), whose sum is σ = 486332784. Its totient is φ = 60544000.

The previous prime is 182721197. The next prime is 182721229. The reversal of 182721216 is 612127281.

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 7 ways as a sum of consecutive naturals, for example, 30466 + ... + 35966.

It is an arithmetic number, because the mean of its divisors is an integer number (8684514).

Almost surely, 2^182721216 is an apocalyptic number.

182721216 is a gapful number since it is divisible by the number (16) 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 182721216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (243166392).

182721216 is an abundant number, since it is smaller than the sum of its proper divisors (303611568).

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

182721216 is a wasteful number, since it uses less digits than its factorization.

182721216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5689 (or 5679 counting only the distinct ones).

The product of its digits is 2688, while the sum is 30.

The square root of 182721216 is about 13517.4411779745. The cubic root of 182721216 is about 567.4526897496.

Adding to 182721216 its reverse (612127281), we get a palindrome (794848497).

The spelling of 182721216 in words is "one hundred eighty-two million, seven hundred twenty-one thousand, two hundred sixteen".