43135213 has 4 divisors (see below), whose sum is σ = 47056608. Its totient is φ = 39213820.

The previous prime is 43135207. The next prime is 43135217. The reversal of 43135213 is 31253134.

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 43135213 - 2²¹ = 41038061 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 (43135217) 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, 1960681 + ... + 1960702.

It is an arithmetic number, because the mean of its divisors is an integer number (11764152).

Almost surely, 2^43135213 is an apocalyptic number.

It is an amenable number.

43135213 is a deficient number, since it is larger than the sum of its proper divisors (3921395).

43135213 is a wasteful number, since it uses less digits than its factorization.

43135213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3921394.

The product of its digits is 1080, while the sum is 22.

The square root of 43135213 is about 6567.7403267791. The cubic root of 43135213 is about 350.7066349593.

Adding to 43135213 its reverse (31253134), we get a palindrome (74388347).

The spelling of 43135213 in words is "forty-three million, one hundred thirty-five thousand, two hundred thirteen".