16221822 has 8 divisors (see below), whose sum is σ = 32443656. Its totient is φ = 5407272.

The previous prime is 16221761. The next prime is 16221823. The reversal of 16221822 is 22812261.

It is a sphenic number, since it is the product of 3 distinct primes.

16221822 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 16221792 and 16221801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16221823) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1351813 + ... + 1351824.

It is an arithmetic number, because the mean of its divisors is an integer number (4055457).

Almost surely, 2^16221822 is an apocalyptic number.

16221822 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

16221822 is a wasteful number, since it uses less digits than its factorization.

16221822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2703642.

The product of its digits is 768, while the sum is 24.

The square root of 16221822 is about 4027.6323069516. The cubic root of 16221822 is about 253.1433621186.

The spelling of 16221822 in words is "sixteen million, two hundred twenty-one thousand, eight hundred twenty-two".