16400222 has 8 divisors (see below), whose sum is σ = 24620736. Its totient is φ = 8193312.

The previous prime is 16400221. The next prime is 16400231. The reversal of 16400222 is 22200461.

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

It is a super-3 number, since 3×16400222³ (a number of 23 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16400222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16400221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 518 + ... + 5750.

It is an arithmetic number, because the mean of its divisors is an integer number (3077592).

Almost surely, 2^16400222 is an apocalyptic number.

16400222 is a deficient number, since it is larger than the sum of its proper divisors (8220514).

16400222 is a wasteful number, since it uses less digits than its factorization.

16400222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6802.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 16400222 is about 4049.7187556669. The cubic root of 16400222 is about 254.0679649484.

Adding to 16400222 its reverse (22200461), we get a palindrome (38600683).

The spelling of 16400222 in words is "sixteen million, four hundred thousand, two hundred twenty-two".