43144540425 has 108 divisors (see below), whose sum is σ = 90158877900. Its totient is φ = 19664951040.

The previous prime is 43144540391. The next prime is 43144540427. The reversal of 43144540425 is 52404544134.

43144540425 is a `hidden beast` number, since 4 + 31 + 44 + 540 + 42 + 5 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 4078227321 + 39066313104 = 63861^2 + 197652^2 .

It is not a de Polignac number, because 43144540425 - 2¹⁹ = 43144016137 is a prime.

It is a super-2 number, since 2×43144540425² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 43144540425.

It is not an unprimeable number, because it can be changed into a prime (43144540427) by changing a digit.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 3842119 + ... + 3853331.

It is an arithmetic number, because the mean of its divisors is an integer number (834804425).

Almost surely, 2^43144540425 is an apocalyptic number.

43144540425 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

43144540425 is an abundant number, since it is smaller than the sum of its proper divisors (47014337475).

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

43144540425 is a wasteful number, since it uses less digits than its factorization.

43144540425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11592 (or 11577 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 36.

The spelling of 43144540425 in words is "forty-three billion, one hundred forty-four million, five hundred forty thousand, four hundred twenty-five".