16223813 has 2 divisors, whose sum is σ = 16223814. Its totient is φ = 16223812.

The previous prime is 16223807. The next prime is 16223821. The reversal of 16223813 is 31832261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13557124 + 2666689 = 3682^2 + 1633^2 .

It is an emirp because it is prime and its reverse (31832261) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16223813 - 2¹⁶ = 16158277 is a prime.

It is a plaindrome in base 9 and base 14.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16223833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8111906 + 8111907.

It is an arithmetic number, because the mean of its divisors is an integer number (8111907).

Almost surely, 2^16223813 is an apocalyptic number.

It is an amenable number.

16223813 is a deficient number, since it is larger than the sum of its proper divisors (1).

16223813 is an equidigital number, since it uses as much as digits as its factorization.

16223813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 26.

The square root of 16223813 is about 4027.8794669156. The cubic root of 16223813 is about 253.1537182882.

The spelling of 16223813 in words is "sixteen million, two hundred twenty-three thousand, eight hundred thirteen".