140431111 has 4 divisors (see below), whose sum is σ = 142208800. Its totient is φ = 138653424.

The previous prime is 140431097. The next prime is 140431153. The reversal of 140431111 is 111134041.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 140431111 - 2¹¹ = 140429063 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140431171) 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, 888726 + ... + 888883.

It is an arithmetic number, because the mean of its divisors is an integer number (35552200).

Almost surely, 2^140431111 is an apocalyptic number.

140431111 is a deficient number, since it is larger than the sum of its proper divisors (1777689).

140431111 is an equidigital number, since it uses as much as digits as its factorization.

140431111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1777688.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 140431111 is about 11850.3633277634. The cubic root of 140431111 is about 519.7818500628.

Adding to 140431111 its reverse (111134041), we get a palindrome (251565152).

The spelling of 140431111 in words is "one hundred forty million, four hundred thirty-one thousand, one hundred eleven".