216552132 has 18 divisors (see below), whose sum is σ = 547395758. Its totient is φ = 72184032.

The previous prime is 216552097. The next prime is 216552151. The reversal of 216552132 is 231255612.

It is a happy number.

216552132 is a `hidden beast` number, since 2 + 1 + 655 + 2 + 1 + 3 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 145588356 + 70963776 = 12066^2 + 8424^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a junction number, because it is equal to n+sod(n) for n = 216552096 and 216552105.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3007633 + ... + 3007704.

Almost surely, 2^216552132 is an apocalyptic number.

It is an amenable number.

216552132 is an abundant number, since it is smaller than the sum of its proper divisors (330843626).

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

216552132 is a wasteful number, since it uses less digits than its factorization.

216552132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6015347 (or 6015342 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 216552132 is about 14715.7103804064. The cubic root of 216552132 is about 600.5107983517.

The spelling of 216552132 in words is "two hundred sixteen million, five hundred fifty-two thousand, one hundred thirty-two".