213231333 has 24 divisors (see below), whose sum is σ = 333988032. Its totient is φ = 118537344.

The previous prime is 213231197. The next prime is 213231353. The reversal of 213231333 is 333132312.

It is not a de Polignac number, because 213231333 - 2⁸ = 213231077 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213231353) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25041 + ... + 32457.

It is an arithmetic number, because the mean of its divisors is an integer number (13916168).

Almost surely, 2^213231333 is an apocalyptic number.

It is an amenable number.

213231333 is a deficient number, since it is larger than the sum of its proper divisors (120756699).

213231333 is an equidigital number, since it uses as much as digits as its factorization.

213231333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7501 (or 7464 counting only the distinct ones).

The product of its digits is 972, while the sum is 21.

The square root of 213231333 is about 14602.4427066159. The cubic root of 213231333 is about 597.4253875308.

Adding to 213231333 its reverse (333132312), we get a palindrome (546363645).

The spelling of 213231333 in words is "two hundred thirteen million, two hundred thirty-one thousand, three hundred thirty-three".