43000400125 has 16 divisors (see below), whose sum is σ = 53735136624. Its totient is φ = 34355040000.

The previous prime is 43000400089. The next prime is 43000400137. The reversal of 43000400125 is 52100400034.

It can be written as a sum of positive squares in 8 ways, for example, as 39994400196 + 3005999929 = 199986^2 + 54827^2 .

It is a de Polignac number, because none of the positive numbers 2^k-43000400125 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130896 + ... + 321145.

It is an arithmetic number, because the mean of its divisors is an integer number (3358446039).

Almost surely, 2^43000400125 is an apocalyptic number.

It is an amenable number.

43000400125 is a deficient number, since it is larger than the sum of its proper divisors (10734736499).

43000400125 is an equidigital number, since it uses as much as digits as its factorization.

43000400125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452817 (or 452807 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

Adding to 43000400125 its reverse (52100400034), we get a palindrome (95100800159).

Subtracting 43000400125 from its reverse (52100400034), we obtain a palindrome (9099999909).

The spelling of 43000400125 in words is "forty-three billion, four hundred thousand, one hundred twenty-five".