213101233 has 4 divisors (see below), whose sum is σ = 222366528. Its totient is φ = 203835940.

The previous prime is 213101221. The next prime is 213101257. The reversal of 213101233 is 332101312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 213101233 - 2⁵ = 213101201 is a prime.

It is a super-2 number, since 2×213101233² = 90824271012240578, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213101293) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4632613 + ... + 4632658.

It is an arithmetic number, because the mean of its divisors is an integer number (55591632).

Almost surely, 2^213101233 is an apocalyptic number.

213101233 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

213101233 is a deficient number, since it is larger than the sum of its proper divisors (9265295).

213101233 is an equidigital number, since it uses as much as digits as its factorization.

213101233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9265294.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 213101233 is about 14597.9872927743. The cubic root of 213101233 is about 597.3038593377.

Adding to 213101233 its reverse (332101312), we get a palindrome (545202545).

The spelling of 213101233 in words is "two hundred thirteen million, one hundred one thousand, two hundred thirty-three".