213605641 has 2 divisors, whose sum is σ = 213605642. Its totient is φ = 213605640.

The previous prime is 213605627. The next prime is 213605653. The reversal of 213605641 is 146506312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 107433225 + 106172416 = 10365^2 + 10304^2 .

It is a cyclic number.

It is not a de Polignac number, because 213605641 - 2⁹ = 213605129 is a prime.

It is not a weakly prime, because it can be changed into another prime (213605621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106802820 + 106802821.

It is an arithmetic number, because the mean of its divisors is an integer number (106802821).

Almost surely, 2^213605641 is an apocalyptic number.

It is an amenable number.

213605641 is a deficient number, since it is larger than the sum of its proper divisors (1).

213605641 is an equidigital number, since it uses as much as digits as its factorization.

213605641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 213605641 is about 14615.2537097376. The cubic root of 213605641 is about 597.7747582940.

The spelling of 213605641 in words is "two hundred thirteen million, six hundred five thousand, six hundred forty-one".