140045347531 has 4 divisors (see below), whose sum is σ = 140937356272. Its totient is φ = 139153338792.

The previous prime is 140045347529. The next prime is 140045347543. The reversal of 140045347531 is 135743540041.

It is a happy number.

140045347531 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, and also an emirpimes, since its reverse is a distinct semiprime: 135743540041 = 103 ⋅1317898447.

It is a cyclic number.

It is not a de Polignac number, because 140045347531 - 2¹ = 140045347529 is a prime.

It is a super-2 number, since 2×140045347531² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140045047531) 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, 446004135 + ... + 446004448.

It is an arithmetic number, because the mean of its divisors is an integer number (35234339068).

Almost surely, 2^140045347531 is an apocalyptic number.

140045347531 is a deficient number, since it is larger than the sum of its proper divisors (892008741).

140045347531 is an equidigital number, since it uses as much as digits as its factorization.

140045347531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 892008740.

The product of its (nonzero) digits is 100800, while the sum is 37.

Adding to 140045347531 its reverse (135743540041), we get a palindrome (275788887572).

The spelling of 140045347531 in words is "one hundred forty billion, forty-five million, three hundred forty-seven thousand, five hundred thirty-one".