216503432 has 32 divisors (see below), whose sum is σ = 438981120. Its totient is φ = 99713280.

The previous prime is 216503387. The next prime is 216503437. The reversal of 216503432 is 234305612.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (216503437) 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, 10544 + ... + 23327.

It is an arithmetic number, because the mean of its divisors is an integer number (13718160).

Almost surely, 2^216503432 is an apocalyptic number.

It is an amenable number.

216503432 is an abundant number, since it is smaller than the sum of its proper divisors (222477688).

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

216503432 is a wasteful number, since it uses less digits than its factorization.

216503432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33941 (or 33937 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 216503432 is about 14714.0555932075. The cubic root of 216503432 is about 600.4657790636.

The spelling of 216503432 in words is "two hundred sixteen million, five hundred three thousand, four hundred thirty-two".