16221024 has 72 divisors (see below), whose sum is σ = 46558512. Its totient is φ = 5356800.

The previous prime is 16221017. The next prime is 16221031. The reversal of 16221024 is 42012261.

16221024 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (16221017) and next prime (16221031).

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 16220988 and 16221006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43302 + ... + 43674.

It is an arithmetic number, because the mean of its divisors is an integer number (646646).

Almost surely, 2^16221024 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16221024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23279256).

16221024 is an abundant number, since it is smaller than the sum of its proper divisors (30337488).

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

16221024 is a wasteful number, since it uses less digits than its factorization.

16221024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540 (or 529 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 16221024 is about 4027.5332400863. The cubic root of 16221024 is about 253.1392110906.

Adding to 16221024 its reverse (42012261), we get a palindrome (58233285).

The spelling of 16221024 in words is "sixteen million, two hundred twenty-one thousand, twenty-four".