16500222 has 12 divisors (see below), whose sum is σ = 35750520. Its totient is φ = 5500068.

The previous prime is 16500193. The next prime is 16500233. The reversal of 16500222 is 22200561.

It is a super-4 number, since 4×16500222⁴ (a number of 30 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 916679 = 16500222 / (1 + 6 + 5 + 0 + 0 + 2 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 16500195 and 16500204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 458322 + ... + 458357.

It is an arithmetic number, because the mean of its divisors is an integer number (2979210).

Almost surely, 2^16500222 is an apocalyptic number.

16500222 is an abundant number, since it is smaller than the sum of its proper divisors (19250298).

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

16500222 is a wasteful number, since it uses less digits than its factorization.

16500222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 916687 (or 916684 counting only the distinct ones).

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

The square root of 16500222 is about 4062.0465285371. The cubic root of 16500222 is about 254.5833102403.

Adding to 16500222 its reverse (22200561), we get a palindrome (38700783).

The spelling of 16500222 in words is "sixteen million, five hundred thousand, two hundred twenty-two".