43421334525 has 24 divisors (see below), whose sum is σ = 79766600960. Its totient is φ = 23158044720.

The previous prime is 43421334487. The next prime is 43421334527. The reversal of 43421334525 is 52543312434.

43421334525 is a `hidden beast` number, since 434 + 213 + 3 + 4 + 5 + 2 + 5 = 666.

It is not a de Polignac number, because 43421334525 - 2²⁴ = 43404557309 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 43421334525.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43421334527) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32163277 + ... + 32164626.

Almost surely, 2^43421334525 is an apocalyptic number.

43421334525 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

43421334525 is a deficient number, since it is larger than the sum of its proper divisors (36345266435).

43421334525 is a wasteful number, since it uses less digits than its factorization.

43421334525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64327922 (or 64327911 counting only the distinct ones).

The product of its digits is 172800, while the sum is 36.

Adding to 43421334525 its reverse (52543312434), we get a palindrome (95964646959).

The spelling of 43421334525 in words is "forty-three billion, four hundred twenty-one million, three hundred thirty-four thousand, five hundred twenty-five".