140440340431 has 4 divisors (see below), whose sum is σ = 140527409832. Its totient is φ = 140353271032.

The previous prime is 140440340419. The next prime is 140440340563. The reversal of 140440340431 is 134043044041.

It is a happy number.

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 140440340431 - 2⁷ = 140440340303 is a prime.

It is a super-2 number, since 2×140440340431² (a number of 23 digits) contains 22 as substring.

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 140440340431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140440340731) 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, 43532281 + ... + 43535506.

It is an arithmetic number, because the mean of its divisors is an integer number (35131852458).

Almost surely, 2^140440340431 is an apocalyptic number.

140440340431 is a deficient number, since it is larger than the sum of its proper divisors (87069401).

140440340431 is an equidigital number, since it uses as much as digits as its factorization.

140440340431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87069400.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 140440340431 its reverse (134043044041), we get a palindrome (274483384472).

The spelling of 140440340431 in words is "one hundred forty billion, four hundred forty million, three hundred forty thousand, four hundred thirty-one".