216142252 has 54 divisors (see below), whose sum is σ = 415529268. Its totient is φ = 98307216.

The previous prime is 216142229. The next prime is 216142259. The reversal of 216142252 is 252241612.

It is not an unprimeable number, because it can be changed into a prime (216142259) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3663399 + ... + 3663457.

Almost surely, 2^216142252 is an apocalyptic number.

It is an amenable number.

216142252 is a deficient number, since it is larger than the sum of its proper divisors (199387016).

216142252 is a wasteful number, since it uses less digits than its factorization.

216142252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203 (or 123 counting only the distinct ones).

The product of its digits is 1920, while the sum is 25.

The square root of 216142252 is about 14701.7771714851. Note that the first 3 decimals coincide. The cubic root of 216142252 is about 600.1316859107.

Adding to 216142252 its reverse (252241612), we get a palindrome (468383864).

The spelling of 216142252 in words is "two hundred sixteen million, one hundred forty-two thousand, two hundred fifty-two".