216578332 has 6 divisors (see below), whose sum is σ = 379012088. Its totient is φ = 108289164.

The previous prime is 216578311. The next prime is 216578333. The reversal of 216578332 is 233875612.

216578332 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 216578291 and 216578300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216578333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27072288 + ... + 27072295.

Almost surely, 2^216578332 is an apocalyptic number.

It is an amenable number.

216578332 is a deficient number, since it is larger than the sum of its proper divisors (162433756).

216578332 is a wasteful number, since it uses less digits than its factorization.

216578332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54144587 (or 54144585 counting only the distinct ones).

The product of its digits is 60480, while the sum is 37.

The square root of 216578332 is about 14716.6005585529. The cubic root of 216578332 is about 600.5350153817.

The spelling of 216578332 in words is "two hundred sixteen million, five hundred seventy-eight thousand, three hundred thirty-two".