43542145225 has 12 divisors (see below), whose sum is σ = 54162592524. Its totient is φ = 34723824320.

The previous prime is 43542145223. The next prime is 43542145253. The reversal of 43542145225 is 52254124534.

It can be written as a sum of positive squares in 6 ways, for example, as 15284871424 + 28257273801 = 123632^2 + 168099^2 .

It is not a de Polignac number, because 43542145225 - 2¹ = 43542145223 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43542145223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2739214 + ... + 2755063.

It is an arithmetic number, because the mean of its divisors is an integer number (4513549377).

Almost surely, 2^43542145225 is an apocalyptic number.

It is an amenable number.

43542145225 is a deficient number, since it is larger than the sum of its proper divisors (10620447299).

43542145225 is a wasteful number, since it uses less digits than its factorization.

43542145225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5494604 (or 5494599 counting only the distinct ones).

The product of its digits is 192000, while the sum is 37.

Adding to 43542145225 its reverse (52254124534), we get a palindrome (95796269759).

The spelling of 43542145225 in words is "forty-three billion, five hundred forty-two million, one hundred forty-five thousand, two hundred twenty-five".