213220433 has 2 divisors, whose sum is σ = 213220434. Its totient is φ = 213220432.

The previous prime is 213220421. The next prime is 213220457. The reversal of 213220433 is 334022312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 132526144 + 80694289 = 11512^2 + 8983^2 .

It is a cyclic number.

It is not a de Polignac number, because 213220433 - 2⁸ = 213220177 is a prime.

It is not a weakly prime, because it can be changed into another prime (213220493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106610216 + 106610217.

It is an arithmetic number, because the mean of its divisors is an integer number (106610217).

Almost surely, 2^213220433 is an apocalyptic number.

It is an amenable number.

213220433 is a deficient number, since it is larger than the sum of its proper divisors (1).

213220433 is an equidigital number, since it uses as much as digits as its factorization.

213220433 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 213220433 is about 14602.0694766187. The cubic root of 213220433 is about 597.4152075890.

Adding to 213220433 its reverse (334022312), we get a palindrome (547242745).

The spelling of 213220433 in words is "two hundred thirteen million, two hundred twenty thousand, four hundred thirty-three".