140343311 has 4 divisors (see below), whose sum is σ = 142991352. Its totient is φ = 137695272.

The previous prime is 140343239. The next prime is 140343323. The reversal of 140343311 is 113343041.

140343311 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: 113343041 = 7 ⋅16191863.

It is not a de Polignac number, because 140343311 - 2²² = 136149007 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 (140343811) 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, 1323941 + ... + 1324046.

It is an arithmetic number, because the mean of its divisors is an integer number (35747838).

Almost surely, 2^140343311 is an apocalyptic number.

140343311 is a deficient number, since it is larger than the sum of its proper divisors (2648041).

140343311 is an equidigital number, since it uses as much as digits as its factorization.

140343311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2648040.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 140343311 is about 11846.6582207811. The cubic root of 140343311 is about 519.6735018950.

Adding to 140343311 its reverse (113343041), we get a palindrome (253686352).

The spelling of 140343311 in words is "one hundred forty million, three hundred forty-three thousand, three hundred eleven".