16222231 has 4 divisors (see below), whose sum is σ = 16247952. Its totient is φ = 16196512.

The previous prime is 16222211. The next prime is 16222259. The reversal of 16222231 is 13222261.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13222261 = 13 ⋅1017097.

It is a cyclic number.

It is not a de Polignac number, because 16222231 - 2¹⁹ = 15697943 is a prime.

It is a super-2 number, since 2×16222231² = 526321557234722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16222199 and 16222208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16222211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11890 + ... + 13183.

It is an arithmetic number, because the mean of its divisors is an integer number (4061988).

Almost surely, 2^16222231 is an apocalyptic number.

16222231 is a deficient number, since it is larger than the sum of its proper divisors (25721).

16222231 is an equidigital number, since it uses as much as digits as its factorization.

16222231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25720.

The product of its digits is 288, while the sum is 19.

The square root of 16222231 is about 4027.6830808791. The cubic root of 16222231 is about 253.1454895978.

Adding to 16222231 its reverse (13222261), we get a palindrome (29444492).

The spelling of 16222231 in words is "sixteen million, two hundred twenty-two thousand, two hundred thirty-one".