43430505040521 has 8 divisors (see below), whose sum is σ = 64341488948960. Its totient is φ = 28953670026996.

The previous prime is 43430505040423. The next prime is 43430505040541. The reversal of 43430505040521 is 12504050503434.

43430505040521 is a `hidden beast` number, since 4 + 3 + 4 + 30 + 50 + 50 + 4 + 0 + 521 = 666.

It is not a de Polignac number, because 43430505040521 - 2⁷ = 43430505040393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43430505040541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 804268611835 + ... + 804268611888.

It is an arithmetic number, because the mean of its divisors is an integer number (8042686118620).

Almost surely, 2^{43430505040521} is an apocalyptic number.

It is an amenable number.

43430505040521 is a deficient number, since it is larger than the sum of its proper divisors (20910983908439).

43430505040521 is a wasteful number, since it uses less digits than its factorization.

43430505040521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1608537223732 (or 1608537223726 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 36.

Adding to 43430505040521 its reverse (12504050503434), we get a palindrome (55934555543955).

The spelling of 43430505040521 in words is "forty-three trillion, four hundred thirty billion, five hundred five million, forty thousand, five hundred twenty-one".