216420339 has 4 divisors (see below), whose sum is σ = 288560456. Its totient is φ = 144280224.

The previous prime is 216420313. The next prime is 216420361. The reversal of 216420339 is 933024612.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 216420339 - 2⁵ = 216420307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216424339) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36070054 + ... + 36070059.

It is an arithmetic number, because the mean of its divisors is an integer number (72140114).

Almost surely, 2^216420339 is an apocalyptic number.

216420339 is a deficient number, since it is larger than the sum of its proper divisors (72140117).

216420339 is an equidigital number, since it uses as much as digits as its factorization.

216420339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72140116.

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 216420339 is about 14711.2317295324. The cubic root of 216420339 is about 600.3889505857.

The spelling of 216420339 in words is "two hundred sixteen million, four hundred twenty thousand, three hundred thirty-nine".