216442006 has 16 divisors (see below), whose sum is σ = 369577728. Its totient is φ = 94105000.

The previous prime is 216442001. The next prime is 216442013. The reversal of 216442006 is 600244612.

216442006 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×216442006² = 93694283922608072, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216442001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 213370 + ... + 214381.

It is an arithmetic number, because the mean of its divisors is an integer number (23098608).

Almost surely, 2^216442006 is an apocalyptic number.

216442006 is a deficient number, since it is larger than the sum of its proper divisors (153135722).

216442006 is a wasteful number, since it uses less digits than its factorization.

216442006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427787.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 216442006 is about 14711.9681212270. The cubic root of 216442006 is about 600.4089859689.

Adding to 216442006 its reverse (600244612), we get a palindrome (816686618).

The spelling of 216442006 in words is "two hundred sixteen million, four hundred forty-two thousand, six".