43216213 has 2 divisors, whose sum is σ = 43216214. Its totient is φ = 43216212.

The previous prime is 43216207. The next prime is 43216231. The reversal of 43216213 is 31261234.

Together with next prime (43216231) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43007364 + 208849 = 6558^2 + 457^2 .

It is a cyclic number.

It is not a de Polignac number, because 43216213 - 2⁵ = 43216181 is a prime.

It is a super-2 number, since 2×43216213² = 3735282132122738, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43216813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21608106 + 21608107.

It is an arithmetic number, because the mean of its divisors is an integer number (21608107).

Almost surely, 2^43216213 is an apocalyptic number.

It is an amenable number.

43216213 is a deficient number, since it is larger than the sum of its proper divisors (1).

43216213 is an equidigital number, since it uses as much as digits as its factorization.

43216213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 22.

The square root of 43216213 is about 6573.9039390609. The cubic root of 43216213 is about 350.9260185579.

Adding to 43216213 its reverse (31261234), we get a palindrome (74477447).

The spelling of 43216213 in words is "forty-three million, two hundred sixteen thousand, two hundred thirteen".