216536412 has 24 divisors (see below), whose sum is σ = 534972816. Its totient is φ = 67932928.

The previous prime is 216536389. The next prime is 216536413. The reversal of 216536412 is 214635612.

It is a self number, because there is not a number n which added to its sum of digits gives 216536412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216536413) 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 7 ways as a sum of consecutive naturals, for example, 530523 + ... + 530930.

It is an arithmetic number, because the mean of its divisors is an integer number (22290534).

Almost surely, 2^216536412 is an apocalyptic number.

It is an amenable number.

216536412 is an abundant number, since it is smaller than the sum of its proper divisors (318436404).

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

216536412 is a wasteful number, since it uses less digits than its factorization.

216536412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1061477 (or 1061475 counting only the distinct ones).

The product of its digits is 8640, while the sum is 30.

The square root of 216536412 is about 14715.1762476703. The cubic root of 216536412 is about 600.4962671961.

The spelling of 216536412 in words is "two hundred sixteen million, five hundred thirty-six thousand, four hundred twelve".