213131333 has 2 divisors, whose sum is σ = 213131334. Its totient is φ = 213131332.

The previous prime is 213131327. The next prime is 213131371. The reversal of 213131333 is 333131312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 203290564 + 9840769 = 14258^2 + 3137^2 .

It is a cyclic number.

It is not a de Polignac number, because 213131333 - 2⁸ = 213131077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213131393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106565666 + 106565667.

It is an arithmetic number, because the mean of its divisors is an integer number (106565667).

Almost surely, 2^213131333 is an apocalyptic number.

It is an amenable number.

213131333 is a deficient number, since it is larger than the sum of its proper divisors (1).

213131333 is an equidigital number, since it uses as much as digits as its factorization.

213131333 is an evil number, because the sum of its binary digits is even.

The product of its digits is 486, while the sum is 20.

The square root of 213131333 is about 14599.0182204147. The cubic root of 213131333 is about 597.3319805573.

Adding to 213131333 its reverse (333131312), we get a palindrome (546262645).

The spelling of 213131333 in words is "two hundred thirteen million, one hundred thirty-one thousand, three hundred thirty-three".