216144234 has 16 divisors (see below), whose sum is σ = 480320640. Its totient is φ = 72048060.

The previous prime is 216144233. The next prime is 216144281. The reversal of 216144234 is 432441612.

It is a happy number.

216144234 is a `hidden beast` number, since 2 + 1 + 614 + 42 + 3 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 216144198 and 216144207.

It is not an unprimeable number, because it can be changed into a prime (216144233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2001282 + ... + 2001389.

It is an arithmetic number, because the mean of its divisors is an integer number (30020040).

Almost surely, 2^216144234 is an apocalyptic number.

216144234 is an abundant number, since it is smaller than the sum of its proper divisors (264176406).

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

216144234 is a wasteful number, since it uses less digits than its factorization.

216144234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4002682 (or 4002676 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

The square root of 216144234 is about 14701.8445781473. The cubic root of 216144234 is about 600.1335202850.

Adding to 216144234 its reverse (432441612), we get a palindrome (648585846).

The spelling of 216144234 in words is "two hundred sixteen million, one hundred forty-four thousand, two hundred thirty-four".