16221354 has 16 divisors (see below), whose sum is σ = 32834592. Its totient is φ = 5341808.

The previous prime is 16221323. The next prime is 16221379. The reversal of 16221354 is 45312261.

It is an unprimeable number.

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, 15789 + ... + 16784.

It is an arithmetic number, because the mean of its divisors is an integer number (2052162).

Almost surely, 2^16221354 is an apocalyptic number.

16221354 is an abundant number, since it is smaller than the sum of its proper divisors (16613238).

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

16221354 is a wasteful number, since it uses less digits than its factorization.

16221354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32661.

The product of its digits is 1440, while the sum is 24.

The square root of 16221354 is about 4027.5742078825. The cubic root of 16221354 is about 253.1409276976.

The spelling of 16221354 in words is "sixteen million, two hundred twenty-one thousand, three hundred fifty-four".