212446139 has 2 divisors, whose sum is σ = 212446140. Its totient is φ = 212446138.

The previous prime is 212446097. The next prime is 212446159. The reversal of 212446139 is 931644212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212446139 - 2¹⁶ = 212380603 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (212446159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106223069 + 106223070.

It is an arithmetic number, because the mean of its divisors is an integer number (106223070).

Almost surely, 2^212446139 is an apocalyptic number.

212446139 is a deficient number, since it is larger than the sum of its proper divisors (1).

212446139 is an equidigital number, since it uses as much as digits as its factorization.

212446139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 32.

The square root of 212446139 is about 14575.5322029763. The cubic root of 212446139 is about 596.6911742931.

The spelling of 212446139 in words is "two hundred twelve million, four hundred forty-six thousand, one hundred thirty-nine".