43439020531 has 2 divisors, whose sum is σ = 43439020532. Its totient is φ = 43439020530.

The previous prime is 43439020523. The next prime is 43439020549. The reversal of 43439020531 is 13502093434.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43439020531 - 2³ = 43439020523 is a prime.

It is a super-2 number, since 2×43439020531² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (43439020631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21719510265 + 21719510266.

It is an arithmetic number, because the mean of its divisors is an integer number (21719510266).

Almost surely, 2^43439020531 is an apocalyptic number.

43439020531 is a deficient number, since it is larger than the sum of its proper divisors (1).

43439020531 is an equidigital number, since it uses as much as digits as its factorization.

43439020531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 34.

The spelling of 43439020531 in words is "forty-three billion, four hundred thirty-nine million, twenty thousand, five hundred thirty-one".