140343031 has 4 divisors (see below), whose sum is σ = 140704200. Its totient is φ = 139981864.

The previous prime is 140343029. The next prime is 140343037. The reversal of 140343031 is 130343041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 130343041 = 4127 ⋅31583.

It is a cyclic number.

It is not a de Polignac number, because 140343031 - 2¹ = 140343029 is a prime.

It is a super-2 number, since 2×140343031² = 39392332700533922, 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 (140343037) 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, 180001 + ... + 180778.

It is an arithmetic number, because the mean of its divisors is an integer number (35176050).

Almost surely, 2^140343031 is an apocalyptic number.

140343031 is a deficient number, since it is larger than the sum of its proper divisors (361169).

140343031 is an equidigital number, since it uses as much as digits as its factorization.

140343031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361168.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 140343031 is about 11846.6464030965. The cubic root of 140343031 is about 519.6731562933.

Adding to 140343031 its reverse (130343041), we get a palindrome (270686072).

The spelling of 140343031 in words is "one hundred forty million, three hundred forty-three thousand, thirty-one".