16223381 has 2 divisors, whose sum is σ = 16223382. Its totient is φ = 16223380.

The previous prime is 16223369. The next prime is 16223393. The reversal of 16223381 is 18332261.

It is a balanced prime because it is at equal distance from previous prime (16223369) and next prime (16223393).

It can be written as a sum of positive squares in only one way, i.e., 11792356 + 4431025 = 3434^2 + 2105^2 .

It is a cyclic number.

It is not a de Polignac number, because 16223381 - 2¹⁴ = 16206997 is a prime.

It is a super-2 number, since 2×16223381² = 526396182142322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 16223381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16223351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8111690 + 8111691.

It is an arithmetic number, because the mean of its divisors is an integer number (8111691).

Almost surely, 2^16223381 is an apocalyptic number.

It is an amenable number.

16223381 is a deficient number, since it is larger than the sum of its proper divisors (1).

16223381 is an equidigital number, since it uses as much as digits as its factorization.

16223381 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 16223381 is about 4027.8258403263. The cubic root of 16223381 is about 253.1514713158.

The spelling of 16223381 in words is "sixteen million, two hundred twenty-three thousand, three hundred eighty-one".