340240421501 has 2 divisors, whose sum is σ = 340240421502. Its totient is φ = 340240421500.

The previous prime is 340240421459. The next prime is 340240421581. The reversal of 340240421501 is 105124042043.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 319367395876 + 20873025625 = 565126^2 + 144475^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-340240421501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (340240421581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170120210750 + 170120210751.

It is an arithmetic number, because the mean of its divisors is an integer number (170120210751).

Almost surely, 2^340240421501 is an apocalyptic number.

It is an amenable number.

340240421501 is a deficient number, since it is larger than the sum of its proper divisors (1).

340240421501 is an equidigital number, since it uses as much as digits as its factorization.

340240421501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 340240421501 its reverse (105124042043), we get a palindrome (445364463544).

The spelling of 340240421501 in words is "three hundred forty billion, two hundred forty million, four hundred twenty-one thousand, five hundred one".