43540431441 has 24 divisors (see below), whose sum is σ = 62887203360. Its totient is φ = 26783842176.

The previous prime is 43540431437. The next prime is 43540431443. The reversal of 43540431441 is 14413404534.

It is not a de Polignac number, because 43540431441 - 2² = 43540431437 is a prime.

It is not an unprimeable number, because it can be changed into a prime (43540431443) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1433470 + ... + 1463528.

It is an arithmetic number, because the mean of its divisors is an integer number (2620300140).

Almost surely, 2^43540431441 is an apocalyptic number.

It is an amenable number.

43540431441 is a deficient number, since it is larger than the sum of its proper divisors (19346771919).

43540431441 is a wasteful number, since it uses less digits than its factorization.

43540431441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32945 (or 32932 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 33.

Adding to 43540431441 its reverse (14413404534), we get a palindrome (57953835975).

The spelling of 43540431441 in words is "forty-three billion, five hundred forty million, four hundred thirty-one thousand, four hundred forty-one".