43420213 has 4 divisors (see below), whose sum is σ = 43626208. Its totient is φ = 43214220.

The previous prime is 43420199. The next prime is 43420229. The reversal of 43420213 is 31202434.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 43420213 - 2¹³ = 43412021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43420253) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102681 + ... + 103102.

It is an arithmetic number, because the mean of its divisors is an integer number (10906552).

Almost surely, 2^43420213 is an apocalyptic number.

It is an amenable number.

43420213 is a deficient number, since it is larger than the sum of its proper divisors (205995).

43420213 is a wasteful number, since it uses less digits than its factorization.

43420213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205994.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 43420213 is about 6589.4015661515. The cubic root of 43420213 is about 351.4773283044.

Adding to 43420213 its reverse (31202434), we get a palindrome (74622647).

The spelling of 43420213 in words is "forty-three million, four hundred twenty thousand, two hundred thirteen".