43255603161 has 12 divisors (see below), whose sum is σ = 62517242788. Its totient is φ = 28820025504.

The previous prime is 43255603133. The next prime is 43255603169. The reversal of 43255603161 is 16130655234.

43255603161 is a `hidden beast` number, since 4 + 3 + 2 + 5 + 560 + 31 + 61 = 666.

43255603161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 14239887561 + 29015715600 = 119331^2 + 170340^2 .

It is not a de Polignac number, because 43255603161 - 2¹⁷ = 43255472089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43255603169) 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, 1404190 + ... + 1434663.

Almost surely, 2^43255603161 is an apocalyptic number.

It is an amenable number.

43255603161 is a deficient number, since it is larger than the sum of its proper divisors (19261639627).

43255603161 is a wasteful number, since it uses less digits than its factorization.

43255603161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2840552 (or 2840549 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

It can be divided in two parts, 43255 and 603161, that added together give a square (646416 = 804²).

The spelling of 43255603161 in words is "forty-three billion, two hundred fifty-five million, six hundred three thousand, one hundred sixty-one".