40431443543 has 16 divisors (see below), whose sum is σ = 41204471616. Its totient is φ = 39664961280.

The previous prime is 40431443539. The next prime is 40431443551. The reversal of 40431443543 is 34534413404.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 40431443543 - 2² = 40431443539 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40431445543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11461646 + ... + 11465172.

It is an arithmetic number, because the mean of its divisors is an integer number (2575279476).

Almost surely, 2^40431443543 is an apocalyptic number.

40431443543 is a deficient number, since it is larger than the sum of its proper divisors (773028073).

40431443543 is a wasteful number, since it uses less digits than its factorization.

40431443543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4394.

The product of its (nonzero) digits is 138240, while the sum is 35.

Adding to 40431443543 its reverse (34534413404), we get a palindrome (74965856947).

The spelling of 40431443543 in words is "forty billion, four hundred thirty-one million, four hundred forty-three thousand, five hundred forty-three".