340240421503 has 4 divisors (see below), whose sum is σ = 340243782768. Its totient is φ = 340237060240.

The previous prime is 340240421501. The next prime is 340240421581. The reversal of 340240421503 is 305124042043.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 305124042043 = 95177 ⋅3205859.

It is a cyclic number.

It is not a de Polignac number, because 340240421503 - 2¹ = 340240421501 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 (340240421501) 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, 1523926 + ... + 1732867.

It is an arithmetic number, because the mean of its divisors is an integer number (85060945692).

Almost surely, 2^340240421503 is an apocalyptic number.

340240421503 is a deficient number, since it is larger than the sum of its proper divisors (3361265).

340240421503 is a wasteful number, since it uses less digits than its factorization.

340240421503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3361264.

The product of its (nonzero) digits is 11520, while the sum is 28.

Adding to 340240421503 its reverse (305124042043), we get a palindrome (645364463546).

The spelling of 340240421503 in words is "three hundred forty billion, two hundred forty million, four hundred twenty-one thousand, five hundred three".