140344031 has 4 divisors (see below), whose sum is σ = 140434272. Its totient is φ = 140253792.

The previous prime is 140344019. The next prime is 140344049. The reversal of 140344031 is 130443041.

It is a happy number.

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 140344031 - 2⁶ = 140343967 is a prime.

It is a super-2 number, since 2×140344031² = 39392894074657922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 140343994 and 140344012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140344931) 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, 42746 + ... + 45911.

It is an arithmetic number, because the mean of its divisors is an integer number (35108568).

Almost surely, 2^140344031 is an apocalyptic number.

140344031 is a deficient number, since it is larger than the sum of its proper divisors (90241).

140344031 is an equidigital number, since it uses as much as digits as its factorization.

140344031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90240.

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

The square root of 140344031 is about 11846.6886090587. The cubic root of 140344031 is about 519.6743905831.

Adding to 140344031 its reverse (130443041), we get a palindrome (270787072).

The spelling of 140344031 in words is "one hundred forty million, three hundred forty-four thousand, thirty-one".