216533072 has 20 divisors (see below), whose sum is σ = 479466336. Its totient is φ = 92799840.

The previous prime is 216533033. The next prime is 216533081. The reversal of 216533072 is 270335612.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 966554 + ... + 966777.

Almost surely, 2^216533072 is an apocalyptic number.

It is an amenable number.

216533072 is an abundant number, since it is smaller than the sum of its proper divisors (262933264).

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

216533072 is a wasteful number, since it uses less digits than its factorization.

216533072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1933346 (or 1933340 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 29.

The square root of 216533072 is about 14715.0627589555. The cubic root of 216533072 is about 600.4931796971.

Adding to 216533072 its reverse (270335612), we get a palindrome (486868684).

The spelling of 216533072 in words is "two hundred sixteen million, five hundred thirty-three thousand, seventy-two".