16228213 has 2 divisors, whose sum is σ = 16228214. Its totient is φ = 16228212.

The previous prime is 16228193. The next prime is 16228231. The reversal of 16228213 is 31282261.

Together with next prime (16228231) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14607684 + 1620529 = 3822^2 + 1273^2 .

It is a cyclic number.

It is not a de Polignac number, because 16228213 - 2¹⁷ = 16097141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16228253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8114106 + 8114107.

It is an arithmetic number, because the mean of its divisors is an integer number (8114107).

Almost surely, 2^16228213 is an apocalyptic number.

It is an amenable number.

16228213 is a deficient number, since it is larger than the sum of its proper divisors (1).

16228213 is an equidigital number, since it uses as much as digits as its factorization.

16228213 is an evil number, because the sum of its binary digits is even.

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

The square root of 16228213 is about 4028.4256229947. The cubic root of 16228213 is about 253.1766018458.

The spelling of 16228213 in words is "sixteen million, two hundred twenty-eight thousand, two hundred thirteen".