212043233 has 4 divisors (see below), whose sum is σ = 221262528. Its totient is φ = 202823940.

The previous prime is 212043203. The next prime is 212043239. The reversal of 212043233 is 332340212.

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 212043233 - 2¹⁴ = 212026849 is a prime.

It is a super-2 number, since 2×212043233² = 89924665322184578, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212043239) 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 3 ways as a sum of consecutive naturals, for example, 4609613 + ... + 4609658.

It is an arithmetic number, because the mean of its divisors is an integer number (55315632).

Almost surely, 2^212043233 is an apocalyptic number.

212043233 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

212043233 is a deficient number, since it is larger than the sum of its proper divisors (9219295).

212043233 is an equidigital number, since it uses as much as digits as its factorization.

212043233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9219294.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 212043233 is about 14561.7043301943. The cubic root of 212043233 is about 596.3137255337.

Adding to 212043233 its reverse (332340212), we get a palindrome (544383445).

The spelling of 212043233 in words is "two hundred twelve million, forty-three thousand, two hundred thirty-three".