43131213 has 12 divisors (see below), whose sum is σ = 62375040. Its totient is φ = 28719816.

The previous prime is 43131169. The next prime is 43131223. The reversal of 43131213 is 31213134.

It is not a de Polignac number, because 43131213 - 2¹⁰ = 43130189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43131223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6820 + ... + 11522.

It is an arithmetic number, because the mean of its divisors is an integer number (5197920).

Almost surely, 2^43131213 is an apocalyptic number.

It is an amenable number.

43131213 is a deficient number, since it is larger than the sum of its proper divisors (19243827).

43131213 is a wasteful number, since it uses less digits than its factorization.

43131213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5728 (or 5725 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 43131213 is about 6567.4358009805. The cubic root of 43131213 is about 350.6957940878.

Adding to 43131213 its reverse (31213134), we get a palindrome (74344347).

The spelling of 43131213 in words is "forty-three million, one hundred thirty-one thousand, two hundred thirteen".