16222138 has 8 divisors (see below), whose sum is σ = 24366132. Its totient is φ = 8100096.

The previous prime is 16222127. The next prime is 16222211. The reversal of 16222138 is 83122261.

It can be written as a sum of positive squares in 2 ways, for example, as 16136289 + 85849 = 4017^2 + 293^2 .

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

It is a super-2 number, since 2×16222138² = 526315522582088, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3495 + ... + 6682.

Almost surely, 2^16222138 is an apocalyptic number.

16222138 is a deficient number, since it is larger than the sum of its proper divisors (8143994).

16222138 is a wasteful number, since it uses less digits than its factorization.

16222138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10976.

The product of its digits is 1152, while the sum is 25.

The square root of 16222138 is about 4027.6715357636. The cubic root of 16222138 is about 253.1450058465.

Adding to 16222138 its reverse (83122261), we get a palindrome (99344399).

The spelling of 16222138 in words is "sixteen million, two hundred twenty-two thousand, one hundred thirty-eight".