140232431 has 2 divisors, whose sum is σ = 140232432. Its totient is φ = 140232430.

The previous prime is 140232413. The next prime is 140232457. The reversal of 140232431 is 134232041.

Together with previous prime (140232413) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 140232431 - 2¹⁰ = 140231407 is a prime.

It is a super-2 number, since 2×140232431² = 39330269408339522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140232731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70116215 + 70116216.

It is an arithmetic number, because the mean of its divisors is an integer number (70116216).

Almost surely, 2^140232431 is an apocalyptic number.

140232431 is a deficient number, since it is larger than the sum of its proper divisors (1).

140232431 is an equidigital number, since it uses as much as digits as its factorization.

140232431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 140232431 is about 11841.9774953341. The cubic root of 140232431 is about 519.5366076391.

Adding to 140232431 its reverse (134232041), we get a palindrome (274464472).

It can be divided in two parts, 1402 and 32431, that added together give a palindrome (33833).

The spelling of 140232431 in words is "one hundred forty million, two hundred thirty-two thousand, four hundred thirty-one".