213033233 has 6 divisors (see below), whose sum is σ = 247814226. Its totient is φ = 182599872.

The previous prime is 213033181. The next prime is 213033241. The reversal of 213033233 is 332330312.

It can be written as a sum of positive squares in only one way, i.e., 203718529 + 9314704 = 14273^2 + 3052^2 .

It is not a de Polignac number, because 213033233 - 2⁸ = 213032977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213033283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2173760 + ... + 2173857.

It is an arithmetic number, because the mean of its divisors is an integer number (41302371).

Almost surely, 2^213033233 is an apocalyptic number.

It is an amenable number.

213033233 is a deficient number, since it is larger than the sum of its proper divisors (34780993).

213033233 is an equidigital number, since it uses as much as digits as its factorization.

213033233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4347631 (or 4347624 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 20.

The square root of 213033233 is about 14595.6580187397. The cubic root of 213033233 is about 597.2403199221.

Adding to 213033233 its reverse (332330312), we get a palindrome (545363545).

The spelling of 213033233 in words is "two hundred thirteen million, thirty-three thousand, two hundred thirty-three".