216246242 has 4 divisors (see below), whose sum is σ = 324369366. Its totient is φ = 108123120.

The previous prime is 216246223. The next prime is 216246257. The reversal of 216246242 is 242642612.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 201044041 + 15202201 = 14179^2 + 3899^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54061559 + ... + 54061562.

Almost surely, 2^216246242 is an apocalyptic number.

216246242 is a deficient number, since it is larger than the sum of its proper divisors (108123124).

216246242 is a wasteful number, since it uses less digits than its factorization.

216246242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108123123.

The product of its digits is 9216, while the sum is 29.

The square root of 216246242 is about 14705.3133934643. The cubic root of 216246242 is about 600.2279152653.

Adding to 216246242 its reverse (242642612), we get a palindrome (458888854).

The spelling of 216246242 in words is "two hundred sixteen million, two hundred forty-six thousand, two hundred forty-two".