43131461220 has 36 divisors (see below), whose sum is σ = 130832099580. Its totient is φ = 11501722944.

The previous prime is 43131461207. The next prime is 43131461227. The reversal of 43131461220 is 2216413134.

It is a happy number.

43131461220 is a `hidden beast` number, since 4 + 3 + 13 + 14 + 612 + 20 = 666.

43131461220 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 5721712164 + 37409749056 = 75642^2 + 193416^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (43131461227) 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, 119809435 + ... + 119809794.

Almost surely, 2^43131461220 is an apocalyptic number.

It is an amenable number.

43131461220 is an abundant number, since it is smaller than the sum of its proper divisors (87700638360).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

43131461220 is a wasteful number, since it uses less digits than its factorization.

43131461220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239619244 (or 239619239 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

Adding to 43131461220 its reverse (2216413134), we get a palindrome (45347874354).

The spelling of 43131461220 in words is "forty-three billion, one hundred thirty-one million, four hundred sixty-one thousand, two hundred twenty".