16213247 has 2 divisors, whose sum is σ = 16213248. Its totient is φ = 16213246.

The previous prime is 16213207. The next prime is 16213273. The reversal of 16213247 is 74231261.

It is an a-pointer prime, because the next prime (16213273) can be obtained adding 16213247 to its sum of digits (26).

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16213247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16213207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8106623 + 8106624.

It is an arithmetic number, because the mean of its divisors is an integer number (8106624).

Almost surely, 2^16213247 is an apocalyptic number.

16213247 is a deficient number, since it is larger than the sum of its proper divisors (1).

16213247 is an equidigital number, since it uses as much as digits as its factorization.

16213247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 26.

The square root of 16213247 is about 4026.5676450297. The cubic root of 16213247 is about 253.0987496428.

The spelling of 16213247 in words is "sixteen million, two hundred thirteen thousand, two hundred forty-seven".