216436512 has 48 divisors (see below), whose sum is σ = 587744640. Its totient is φ = 69656832.

The previous prime is 216436487. The next prime is 216436523. The reversal of 216436512 is 215634612.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×216436512² = 93689527453452288, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 216436512.

It is an unprimeable number.

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, 36088 + ... + 41655.

It is an arithmetic number, because the mean of its divisors is an integer number (12244680).

Almost surely, 2^216436512 is an apocalyptic number.

It is an amenable number.

216436512 is an abundant number, since it is smaller than the sum of its proper divisors (371308128).

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

216436512 is a wasteful number, since it uses less digits than its factorization.

216436512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77785 (or 77777 counting only the distinct ones).

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

The square root of 216436512 is about 14711.7814013124. The cubic root of 216436512 is about 600.4039058169.

The spelling of 216436512 in words is "two hundred sixteen million, four hundred thirty-six thousand, five hundred twelve".