216342012 has 24 divisors (see below), whose sum is σ = 505156176. Its totient is φ = 72062848.

The previous prime is 216342011. The next prime is 216342013. The reversal of 216342012 is 210243612.

It is an interprime number because it is at equal distance from previous prime (216342011) and next prime (216342013).

It is a self number, because there is not a number n which added to its sum of digits gives 216342012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216342011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13768 + ... + 24944.

It is an arithmetic number, because the mean of its divisors is an integer number (21048174).

Almost surely, 2^216342012 is an apocalyptic number.

It is an amenable number.

216342012 is an abundant number, since it is smaller than the sum of its proper divisors (288814164).

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

216342012 is a wasteful number, since it uses less digits than its factorization.

216342012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12797 (or 12795 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 216342012 is about 14708.5693389942. The cubic root of 216342012 is about 600.3165107833.

Adding to 216342012 its reverse (210243612), we get a palindrome (426585624).

The spelling of 216342012 in words is "two hundred sixteen million, three hundred forty-two thousand, twelve".