16221234 has 16 divisors (see below), whose sum is σ = 33197472. Its totient is φ = 5281248.

The previous prime is 16221223. The next prime is 16221239. The reversal of 16221234 is 43212261.

16221234 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 16221234.

It is not an unprimeable number, because it can be changed into a prime (16221239) 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, 31179 + ... + 31694.

It is an arithmetic number, because the mean of its divisors is an integer number (2074842).

Almost surely, 2^16221234 is an apocalyptic number.

16221234 is an abundant number, since it is smaller than the sum of its proper divisors (16976238).

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

16221234 is a wasteful number, since it uses less digits than its factorization.

16221234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62921.

The product of its digits is 576, while the sum is 21.

The square root of 16221234 is about 4027.5593105502. The cubic root of 16221234 is about 253.1403034796.

Adding to 16221234 its reverse (43212261), we get a palindrome (59433495).

The spelling of 16221234 in words is "sixteen million, two hundred twenty-one thousand, two hundred thirty-four".