212215433 has 2 divisors, whose sum is σ = 212215434. Its totient is φ = 212215432.

The previous prime is 212215361. The next prime is 212215439. The reversal of 212215433 is 334512212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 204833344 + 7382089 = 14312^2 + 2717^2 .

It is a cyclic number.

It is not a de Polignac number, because 212215433 - 2⁸ = 212215177 is a prime.

It is a Chen prime.

It is a nialpdrome in base 11.

It is a junction number, because it is equal to n+sod(n) for n = 212215399 and 212215408.

It is not a weakly prime, because it can be changed into another prime (212215439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106107716 + 106107717.

It is an arithmetic number, because the mean of its divisors is an integer number (106107717).

Almost surely, 2^212215433 is an apocalyptic number.

It is an amenable number.

212215433 is a deficient number, since it is larger than the sum of its proper divisors (1).

212215433 is an equidigital number, since it uses as much as digits as its factorization.

212215433 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1440, while the sum is 23.

The square root of 212215433 is about 14567.6158996591. The cubic root of 212215433 is about 596.4751036919.

Adding to 212215433 its reverse (334512212), we get a palindrome (546727645).

The spelling of 212215433 in words is "two hundred twelve million, two hundred fifteen thousand, four hundred thirty-three".