140332431 has 4 divisors (see below), whose sum is σ = 187109912. Its totient is φ = 93554952.

The previous prime is 140332429. The next prime is 140332447. The reversal of 140332431 is 134233041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 134233041 = 3 ⋅44744347.

It is not a de Polignac number, because 140332431 - 2¹ = 140332429 is a prime.

It is a super-2 number, since 2×140332431² = 39386382380739522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 140332398 and 140332407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140332411) 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, 23388736 + ... + 23388741.

It is an arithmetic number, because the mean of its divisors is an integer number (46777478).

Almost surely, 2^140332431 is an apocalyptic number.

140332431 is a deficient number, since it is larger than the sum of its proper divisors (46777481).

140332431 is an equidigital number, since it uses as much as digits as its factorization.

140332431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46777480.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 140332431 is about 11846.1990106532. The cubic root of 140332431 is about 519.6600724607.

Adding to 140332431 its reverse (134233041), we get a palindrome (274565472).

The spelling of 140332431 in words is "one hundred forty million, three hundred thirty-two thousand, four hundred thirty-one".