16221067 has 4 divisors (see below), whose sum is σ = 16232920. Its totient is φ = 16209216.

The previous prime is 16221061. The next prime is 16221089. The reversal of 16221067 is 76012261.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16221067 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (16221061) 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, 3558 + ... + 6715.

It is an arithmetic number, because the mean of its divisors is an integer number (4058230).

Almost surely, 2^16221067 is an apocalyptic number.

16221067 is a deficient number, since it is larger than the sum of its proper divisors (11853).

16221067 is a wasteful number, since it uses less digits than its factorization.

16221067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11852.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 16221067 is about 4027.5385783379. The cubic root of 16221067 is about 253.1394347710.

The spelling of 16221067 in words is "sixteen million, two hundred twenty-one thousand, sixty-seven".