40431043 has 12 divisors (see below), whose sum is σ = 42304248. Its totient is φ = 38612160.

The previous prime is 40431023. The next prime is 40431059. The reversal of 40431043 is 34013404.

It is not a de Polignac number, because 40431043 - 2⁵ = 40431011 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40431043.

It is not an unprimeable number, because it can be changed into a prime (40431023) 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, 370873 + ... + 370981.

It is an arithmetic number, because the mean of its divisors is an integer number (3525354).

Almost surely, 2^40431043 is an apocalyptic number.

40431043 is a deficient number, since it is larger than the sum of its proper divisors (1873205).

40431043 is an equidigital number, since it uses as much as digits as its factorization.

40431043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342 (or 233 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 40431043 is about 6358.5409489914. The cubic root of 40431043 is about 343.2192581922.

Adding to 40431043 its reverse (34013404), we get a palindrome (74444447).

The spelling of 40431043 in words is "forty million, four hundred thirty-one thousand, forty-three".