43021043231 has 2 divisors, whose sum is σ = 43021043232. Its totient is φ = 43021043230.

The previous prime is 43021043203. The next prime is 43021043267. The reversal of 43021043231 is 13234012034.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43021043231 - 2¹⁸ = 43020781087 is a prime.

It is a super-2 number, since 2×43021043231² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 43021043197 and 43021043206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43021043201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21510521615 + 21510521616.

It is an arithmetic number, because the mean of its divisors is an integer number (21510521616).

Almost surely, 2^43021043231 is an apocalyptic number.

43021043231 is a deficient number, since it is larger than the sum of its proper divisors (1).

43021043231 is an equidigital number, since it uses as much as digits as its factorization.

43021043231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 43021043231 its reverse (13234012034), we get a palindrome (56255055265).

The spelling of 43021043231 in words is "forty-three billion, twenty-one million, forty-three thousand, two hundred thirty-one".