16221027 has 8 divisors (see below), whose sum is σ = 21646864. Its totient is φ = 10804608.

The previous prime is 16221017. The next prime is 16221031. The reversal of 16221027 is 72012261.

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

It is not a de Polignac number, because 16221027 - 2⁷ = 16220899 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16220994 and 16221012.

It is not an unprimeable number, because it can be changed into a prime (16221017) 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, 4623 + ... + 7335.

It is an arithmetic number, because the mean of its divisors is an integer number (2705858).

Almost surely, 2^16221027 is an apocalyptic number.

16221027 is a deficient number, since it is larger than the sum of its proper divisors (5425837).

16221027 is a wasteful number, since it uses less digits than its factorization.

16221027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4709.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 16221027 is about 4027.5336125227. The cubic root of 16221027 is about 253.1392266962.

Adding to 16221027 its reverse (72012261), we get a palindrome (88233288).

The spelling of 16221027 in words is "sixteen million, two hundred twenty-one thousand, twenty-seven".