216966012 has 24 divisors (see below), whose sum is σ = 506760912. Its totient is φ = 72249600.

The previous prime is 216966007. The next prime is 216966017. The reversal of 216966012 is 210669612.

It is an interprime number because it is at equal distance from previous prime (216966007) and next prime (216966017).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216966017) 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, 4212 + ... + 21252.

It is an arithmetic number, because the mean of its divisors is an integer number (21115038).

Almost surely, 2^216966012 is an apocalyptic number.

It is an amenable number.

216966012 is an abundant number, since it is smaller than the sum of its proper divisors (289794900).

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

216966012 is a wasteful number, since it uses less digits than its factorization.

216966012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18109 (or 18107 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 216966012 is about 14729.7661895904. The cubic root of 216966012 is about 600.8931254408.

The spelling of 216966012 in words is "two hundred sixteen million, nine hundred sixty-six thousand, twelve".