340240031 has 2 divisors, whose sum is σ = 340240032. Its totient is φ = 340240030.

The previous prime is 340240027. The next prime is 340240073. The reversal of 340240031 is 130042043.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 340240031 - 2² = 340240027 is a prime.

It is a super-2 number, since 2×340240031² = 231526557389761922, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 340239991 and 340240009.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (340240001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170120015 + 170120016.

It is an arithmetic number, because the mean of its divisors is an integer number (170120016).

Almost surely, 2^340240031 is an apocalyptic number.

340240031 is a deficient number, since it is larger than the sum of its proper divisors (1).

340240031 is an equidigital number, since it uses as much as digits as its factorization.

340240031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 340240031 is about 18445.5965205791. The cubic root of 340240031 is about 698.1174115508.

Adding to 340240031 its reverse (130042043), we get a palindrome (470282074).

The spelling of 340240031 in words is "three hundred forty million, two hundred forty thousand, thirty-one".