216000139 has 2 divisors, whose sum is σ = 216000140. Its totient is φ = 216000138.

The previous prime is 216000131. The next prime is 216000179. The reversal of 216000139 is 931000612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 216000139 - 2³ = 216000131 is a prime.

It is not a weakly prime, because it can be changed into another prime (216000131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108000069 + 108000070.

It is an arithmetic number, because the mean of its divisors is an integer number (108000070).

Almost surely, 2^216000139 is an apocalyptic number.

216000139 is a deficient number, since it is larger than the sum of its proper divisors (1).

216000139 is an equidigital number, since it uses as much as digits as its factorization.

216000139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 216000139 is about 14696.9431855743. The cubic root of 216000139 is about 600.0001287037. Note that the first 3 decimals are identical.

The spelling of 216000139 in words is "two hundred sixteen million, one hundred thirty-nine", and thus it is an aban number.