43135132231 has 2 divisors, whose sum is σ = 43135132232. Its totient is φ = 43135132230.

The previous prime is 43135132193. The next prime is 43135132253. The reversal of 43135132231 is 13223153134.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43135132231 is a prime.

It is a super-2 number, since 2×43135132231² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 43135132231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43135139231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21567566115 + 21567566116.

It is an arithmetic number, because the mean of its divisors is an integer number (21567566116).

Almost surely, 2^43135132231 is an apocalyptic number.

43135132231 is a deficient number, since it is larger than the sum of its proper divisors (1).

43135132231 is an equidigital number, since it uses as much as digits as its factorization.

43135132231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 28.

Adding to 43135132231 its reverse (13223153134), we get a palindrome (56358285365).

The spelling of 43135132231 in words is "forty-three billion, one hundred thirty-five million, one hundred thirty-two thousand, two hundred thirty-one".