40431313123 has 4 divisors (see below), whose sum is σ = 40438578760. Its totient is φ = 40424047488.

The previous prime is 40431313121. The next prime is 40431313127. The reversal of 40431313123 is 32131313404.

40431313123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40431313123 - 2¹ = 40431313121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40431313121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3624465 + ... + 3635602.

It is an arithmetic number, because the mean of its divisors is an integer number (10109644690).

Almost surely, 2^40431313123 is an apocalyptic number.

40431313123 is a deficient number, since it is larger than the sum of its proper divisors (7265637).

40431313123 is an equidigital number, since it uses as much as digits as its factorization.

40431313123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7265636.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 40431313123 its reverse (32131313404), we get a palindrome (72562626527).

The spelling of 40431313123 in words is "forty billion, four hundred thirty-one million, three hundred thirteen thousand, one hundred twenty-three".