43406213 has 2 divisors, whose sum is σ = 43406214. Its totient is φ = 43406212.

The previous prime is 43406201. The next prime is 43406273. The reversal of 43406213 is 31260434.

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., 37540129 + 5866084 = 6127^2 + 2422^2 .

It is a cyclic number.

It is not a de Polignac number, because 43406213 - 2⁶ = 43406149 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43406273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21703106 + 21703107.

It is an arithmetic number, because the mean of its divisors is an integer number (21703107).

Almost surely, 2^43406213 is an apocalyptic number.

It is an amenable number.

43406213 is a deficient number, since it is larger than the sum of its proper divisors (1).

43406213 is an equidigital number, since it uses as much as digits as its factorization.

43406213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 43406213 is about 6588.3391685614. The cubic root of 43406213 is about 351.4395485761.

Adding to 43406213 its reverse (31260434), we get a palindrome (74666647).

The spelling of 43406213 in words is "forty-three million, four hundred six thousand, two hundred thirteen".