216506982 has 16 divisors (see below), whose sum is σ = 447945840. Its totient is φ = 69680352.

The previous prime is 216506921. The next prime is 216506989. The reversal of 216506982 is 289605612.

It is a self number, because there is not a number n which added to its sum of digits gives 216506982.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216506989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 621973 + ... + 622320.

It is an arithmetic number, because the mean of its divisors is an integer number (27996615).

Almost surely, 2^216506982 is an apocalyptic number.

216506982 is an abundant number, since it is smaller than the sum of its proper divisors (231438858).

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

216506982 is a wasteful number, since it uses less digits than its factorization.

216506982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1244327.

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 216506982 is about 14714.1762256675. The cubic root of 216506982 is about 600.4690609852.

The spelling of 216506982 in words is "two hundred sixteen million, five hundred six thousand, nine hundred eighty-two".