16221954 has 16 divisors (see below), whose sum is σ = 37078848. Its totient is φ = 4634832.

The previous prime is 16221929. The next prime is 16221971. The reversal of 16221954 is 45912261.

16221954 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 an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 193077 + ... + 193160.

It is an arithmetic number, because the mean of its divisors is an integer number (2317428).

Almost surely, 2^16221954 is an apocalyptic number.

16221954 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

16221954 is an abundant number, since it is smaller than the sum of its proper divisors (20856894).

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

16221954 is a wasteful number, since it uses less digits than its factorization.

16221954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386249.

The product of its digits is 4320, while the sum is 30.

The square root of 16221954 is about 4027.6486937170. The cubic root of 16221954 is about 253.1440487417.

The spelling of 16221954 in words is "sixteen million, two hundred twenty-one thousand, nine hundred fifty-four".