216540882 has 12 divisors (see below), whose sum is σ = 469171950. Its totient is φ = 72180288.

The previous prime is 216540823. The next prime is 216540887. The reversal of 216540882 is 288045612.

It can be written as a sum of positive squares in only one way, i.e., 111703761 + 104837121 = 10569^2 + 10239^2 .

It is not an unprimeable number, because it can be changed into a prime (216540887) 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 5 ways as a sum of consecutive naturals, for example, 6015007 + ... + 6015042.

Almost surely, 2^216540882 is an apocalyptic number.

216540882 is an abundant number, since it is smaller than the sum of its proper divisors (252631068).

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

216540882 is a wasteful number, since it uses less digits than its factorization.

216540882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12030057 (or 12030054 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The square root of 216540882 is about 14715.3281308981. The cubic root of 216540882 is about 600.5003992184.

The spelling of 216540882 in words is "two hundred sixteen million, five hundred forty thousand, eight hundred eighty-two".