216220439 has 2 divisors, whose sum is σ = 216220440. Its totient is φ = 216220438.

The previous prime is 216220423. The next prime is 216220463. The reversal of 216220439 is 934022612.

216220439 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 216220439 - 2⁴ = 216220423 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216225439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108110219 + 108110220.

It is an arithmetic number, because the mean of its divisors is an integer number (108110220).

Almost surely, 2^216220439 is an apocalyptic number.

216220439 is a deficient number, since it is larger than the sum of its proper divisors (1).

216220439 is an equidigital number, since it uses as much as digits as its factorization.

216220439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 216220439 is about 14704.4360313478. The cubic root of 216220439 is about 600.2040407896.

The spelling of 216220439 in words is "two hundred sixteen million, two hundred twenty thousand, four hundred thirty-nine".