216454528 has 16 divisors (see below), whose sum is σ = 431218260. Its totient is φ = 108227200.

The previous prime is 216454519. The next prime is 216454543. The reversal of 216454528 is 825454612.

It is a tau number, because it is divible by the number of its divisors (16).

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 845398 + ... + 845653.

Almost surely, 2^216454528 is an apocalyptic number.

It is an amenable number.

216454528 is a deficient number, since it is larger than the sum of its proper divisors (214763732).

216454528 is an equidigital number, since it uses as much as digits as its factorization.

216454528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1691065 (or 1691053 counting only the distinct ones).

The product of its digits is 76800, while the sum is 37.

The square root of 216454528 is about 14712.3936869566. The cubic root of 216454528 is about 600.4205643997.

The spelling of 216454528 in words is "two hundred sixteen million, four hundred fifty-four thousand, five hundred twenty-eight".