40140343231 has 4 divisors (see below), whose sum is σ = 40141441512. Its totient is φ = 40139244952.

The previous prime is 40140343207. The next prime is 40140343247. The reversal of 40140343231 is 13234304104.

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 40140343231 - 2⁹ = 40140342719 is a prime.

It is a super-2 number, since 2×40140343231² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40140343196 and 40140343205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40140343261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 492361 + ... + 568066.

It is an arithmetic number, because the mean of its divisors is an integer number (10035360378).

Almost surely, 2^40140343231 is an apocalyptic number.

40140343231 is a deficient number, since it is larger than the sum of its proper divisors (1098281).

40140343231 is a wasteful number, since it uses less digits than its factorization.

40140343231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1098280.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 40140343231 its reverse (13234304104), we get a palindrome (53374647335).

The spelling of 40140343231 in words is "forty billion, one hundred forty million, three hundred forty-three thousand, two hundred thirty-one".