213231233 has 8 divisors (see below), whose sum is σ = 216258336. Its totient is φ = 210215200.

The previous prime is 213231197. The next prime is 213231353. The reversal of 213231233 is 332132312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 213231233 - 2⁶ = 213231169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213233233) 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 in 7 ways as a sum of consecutive naturals, for example, 40778 + ... + 45708.

It is an arithmetic number, because the mean of its divisors is an integer number (27032292).

Almost surely, 2^213231233 is an apocalyptic number.

It is an amenable number.

213231233 is a deficient number, since it is larger than the sum of its proper divisors (3027103).

213231233 is an equidigital number, since it uses as much as digits as its factorization.

213231233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5535.

The product of its digits is 648, while the sum is 20.

The square root of 213231233 is about 14602.4392825308. The cubic root of 213231233 is about 597.4252941384.

Adding to 213231233 its reverse (332132312), we get a palindrome (545363545).

The spelling of 213231233 in words is "two hundred thirteen million, two hundred thirty-one thousand, two hundred thirty-three".