213086243 has 2 divisors, whose sum is σ = 213086244. Its totient is φ = 213086242.

The previous prime is 213086239. The next prime is 213086249. The reversal of 213086243 is 342680312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213086243 - 2² = 213086239 is a prime.

It is not a weakly prime, because it can be changed into another prime (213086249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106543121 + 106543122.

It is an arithmetic number, because the mean of its divisors is an integer number (106543122).

Almost surely, 2^213086243 is an apocalyptic number.

213086243 is a deficient number, since it is larger than the sum of its proper divisors (1).

213086243 is an equidigital number, since it uses as much as digits as its factorization.

213086243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 213086243 is about 14597.4738568014. The cubic root of 213086243 is about 597.2898537957.

The spelling of 213086243 in words is "two hundred thirteen million, eighty-six thousand, two hundred forty-three".