16222500 has 180 divisors, whose sum is σ = 59131072. Its totient is φ = 3672000.

The previous prime is 16222499. The next prime is 16222529. The reversal of 16222500 is 522261.

16222500 is a `hidden beast` number, since 162 + 2 + 2 + 500 = 666.

16222500 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (180).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 157449 + ... + 157551.

Almost surely, 2^16222500 is an apocalyptic number.

16222500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16222500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29565536).

16222500 is an abundant number, since it is smaller than the sum of its proper divisors (42908572).

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

16222500 is a wasteful number, since it uses less digits than its factorization.

16222500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140 (or 120 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 16222500 is about 4027.7164746293. The cubic root of 16222500 is about 253.1468888250.

Adding to 16222500 its reverse (522261), we get a palindrome (16744761).

The spelling of 16222500 in words is "sixteen million, two hundred twenty-two thousand, five hundred".