16221038 has 8 divisors (see below), whose sum is σ = 24665088. Its totient is φ = 7999344.

The previous prime is 16221031. The next prime is 16221061. The reversal of 16221038 is 83012261.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16221031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55406 + ... + 55697.

It is an arithmetic number, because the mean of its divisors is an integer number (3083136).

Almost surely, 2^16221038 is an apocalyptic number.

16221038 is a deficient number, since it is larger than the sum of its proper divisors (8444050).

16221038 is a wasteful number, since it uses less digits than its factorization.

16221038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111178.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 16221038 is about 4027.5349781225. The cubic root of 16221038 is about 253.1392839168.

Adding to 16221038 its reverse (83012261), we get a palindrome (99233299).

The spelling of 16221038 in words is "sixteen million, two hundred twenty-one thousand, thirty-eight".