43431020505225 has 18 divisors (see below), whose sum is σ = 77789783394206. Its totient is φ = 23163210936000.

The previous prime is 43431020505221. The next prime is 43431020505281. The reversal of 43431020505225 is 52250502013434.

43431020505225 is a `hidden beast` number, since 4 + 3 + 43 + 102 + 0 + 505 + 2 + 2 + 5 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 19433475216 + 43411587030009 = 139404^2 + 6588747^2 .

It is not a de Polignac number, because 43431020505225 - 2² = 43431020505221 is a prime.

It is a super-3 number, since 3×43431020505225³ (a number of 42 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 43431020505225.

It is not an unprimeable number, because it can be changed into a prime (43431020505221) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 96513378676 + ... + 96513379125.

Almost surely, 2^{43431020505225} is an apocalyptic number.

43431020505225 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

43431020505225 is a deficient number, since it is larger than the sum of its proper divisors (34358762888981).

43431020505225 is a wasteful number, since it uses less digits than its factorization.

43431020505225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193026757817 (or 193026757809 counting only the distinct ones).

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

Adding to 43431020505225 its reverse (52250502013434), we get a palindrome (95681522518659).

The spelling of 43431020505225 in words is "forty-three trillion, four hundred thirty-one billion, twenty million, five hundred five thousand, two hundred twenty-five".