43131111213 has 32 divisors (see below), whose sum is σ = 63029957760. Its totient is φ = 26113167360.

The previous prime is 43131111211. The next prime is 43131111227. The reversal of 43131111213 is 31211113134.

It is not a de Polignac number, because 43131111213 - 2¹ = 43131111211 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 43131111213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43131111211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2619978 + ... + 2636388.

It is an arithmetic number, because the mean of its divisors is an integer number (1969686180).

Almost surely, 2^43131111213 is an apocalyptic number.

It is an amenable number.

43131111213 is a deficient number, since it is larger than the sum of its proper divisors (19898846547).

43131111213 is a wasteful number, since it uses less digits than its factorization.

43131111213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18237.

The product of its digits is 216, while the sum is 21.

Adding to 43131111213 its reverse (31211113134), we get a palindrome (74342224347).

The spelling of 43131111213 in words is "forty-three billion, one hundred thirty-one million, one hundred eleven thousand, two hundred thirteen".