212444233 has 2 divisors, whose sum is σ = 212444234. Its totient is φ = 212444232.

The previous prime is 212444231. The next prime is 212444237. The reversal of 212444233 is 332444212.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 130233744 + 82210489 = 11412^2 + 9067^2 .

It is a cyclic number.

It is not a de Polignac number, because 212444233 - 2¹ = 212444231 is a prime.

Together with 212444231, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 212444198 and 212444207.

It is not a weakly prime, because it can be changed into another prime (212444231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106222116 + 106222117.

It is an arithmetic number, because the mean of its divisors is an integer number (106222117).

Almost surely, 2^212444233 is an apocalyptic number.

It is an amenable number.

212444233 is a deficient number, since it is larger than the sum of its proper divisors (1).

212444233 is an equidigital number, since it uses as much as digits as its factorization.

212444233 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4608, while the sum is 25.

The square root of 212444233 is about 14575.4668192823. The cubic root of 212444233 is about 596.6893898458.

Adding to 212444233 its reverse (332444212), we get a palindrome (544888445).

The spelling of 212444233 in words is "two hundred twelve million, four hundred forty-four thousand, two hundred thirty-three".