43211213 has 2 divisors, whose sum is σ = 43211214. Its totient is φ = 43211212.

The previous prime is 43211177. The next prime is 43211243. The reversal of 43211213 is 31211234.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42797764 + 413449 = 6542^2 + 643^2 .

It is a cyclic number.

It is not a de Polignac number, because 43211213 - 2¹² = 43207117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 43211191 and 43211200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43211243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21605606 + 21605607.

It is an arithmetic number, because the mean of its divisors is an integer number (21605607).

Almost surely, 2^43211213 is an apocalyptic number.

It is an amenable number.

43211213 is a deficient number, since it is larger than the sum of its proper divisors (1).

43211213 is an equidigital number, since it uses as much as digits as its factorization.

43211213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 144, while the sum is 17.

The square root of 43211213 is about 6573.5236365286. The cubic root of 43211213 is about 350.9124843027.

Adding to 43211213 its reverse (31211234), we get a palindrome (74422447).

The spelling of 43211213 in words is "forty-three million, two hundred eleven thousand, two hundred thirteen".