212044139 has 2 divisors, whose sum is σ = 212044140. Its totient is φ = 212044138.

The previous prime is 212044121. The next prime is 212044181. The reversal of 212044139 is 931440212.

212044139 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 212044139 - 2⁸ = 212043883 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (212040139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106022069 + 106022070.

It is an arithmetic number, because the mean of its divisors is an integer number (106022070).

Almost surely, 2^212044139 is an apocalyptic number.

212044139 is a deficient number, since it is larger than the sum of its proper divisors (1).

212044139 is an equidigital number, since it uses as much as digits as its factorization.

212044139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 212044139 is about 14561.7354391570. The cubic root of 212044139 is about 596.3145748251.

The spelling of 212044139 in words is "two hundred twelve million, forty-four thousand, one hundred thirty-nine".