140324231 has 4 divisors (see below), whose sum is σ = 142971912. Its totient is φ = 137676552.

The previous prime is 140324227. The next prime is 140324257. The reversal of 140324231 is 132423041.

140324231 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: 132423041 = 31 ⋅4271711.

It is a cyclic number.

It is not a de Polignac number, because 140324231 - 2² = 140324227 is a prime.

It is a super-2 number, since 2×140324231² = 39381779611482722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140324201) 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, 1323761 + ... + 1323866.

It is an arithmetic number, because the mean of its divisors is an integer number (35742978).

Almost surely, 2^140324231 is an apocalyptic number.

140324231 is a deficient number, since it is larger than the sum of its proper divisors (2647681).

140324231 is an equidigital number, since it uses as much as digits as its factorization.

140324231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2647680.

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

The square root of 140324231 is about 11845.8529030205. The cubic root of 140324231 is about 519.6499505534.

Adding to 140324231 its reverse (132423041), we get a palindrome (272747272).

The spelling of 140324231 in words is "one hundred forty million, three hundred twenty-four thousand, two hundred thirty-one".