216030042 has 24 divisors (see below), whose sum is σ = 468344916. Its totient is φ = 71966976.

The previous prime is 216029987. The next prime is 216030049. The reversal of 216030042 is 240030612.

It is a happy number.

216030042 is a `hidden beast` number, since 21 + 603 + 0 + 0 + 42 = 666.

216030042 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 199063881 + 16966161 = 14109^2 + 4119^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 216029997 and 216030024.

It is not an unprimeable number, because it can be changed into a prime (216030049) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45568 + ... + 50084.

Almost surely, 2^216030042 is an apocalyptic number.

216030042 is an abundant number, since it is smaller than the sum of its proper divisors (252314874).

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

216030042 is a wasteful number, since it uses less digits than its factorization.

216030042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7182 (or 7179 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 216030042 is about 14697.9604707592. The cubic root of 216030042 is about 600.0278153772.

Adding to 216030042 its reverse (240030612), we get a palindrome (456060654).

The spelling of 216030042 in words is "two hundred sixteen million, thirty thousand, forty-two".