140431204321 has 4 divisors (see below), whose sum is σ = 140432254144. Its totient is φ = 140430154500.

The previous prime is 140431204313. The next prime is 140431204337. The reversal of 140431204321 is 123402134041.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 123402134041 = 163 ⋅757068307.

It is a cyclic number.

It is not a de Polignac number, because 140431204321 - 2³ = 140431204313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140431204301) 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, 288885 + ... + 603586.

It is an arithmetic number, because the mean of its divisors is an integer number (35108063536).

Almost surely, 2^140431204321 is an apocalyptic number.

It is an amenable number.

140431204321 is a deficient number, since it is larger than the sum of its proper divisors (1049823).

140431204321 is an equidigital number, since it uses as much as digits as its factorization.

140431204321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1049822.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 140431204321 its reverse (123402134041), we get a palindrome (263833338362).

The spelling of 140431204321 in words is "one hundred forty billion, four hundred thirty-one million, two hundred four thousand, three hundred twenty-one".