343240511 has 4 divisors (see below), whose sum is σ = 344545872. Its totient is φ = 341935152.

The previous prime is 343240501. The next prime is 343240517. The reversal of 343240511 is 115042343.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-343240511 is a prime.

It is a super-2 number, since 2×343240511² = 235628096783082242, 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 (343240517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 652286 + ... + 652811.

It is an arithmetic number, because the mean of its divisors is an integer number (86136468).

Almost surely, 2^343240511 is an apocalyptic number.

343240511 is a deficient number, since it is larger than the sum of its proper divisors (1305361).

343240511 is a wasteful number, since it uses less digits than its factorization.

343240511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1305360.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 343240511 is about 18526.7512262674. The cubic root of 343240511 is about 700.1635746984.

Adding to 343240511 its reverse (115042343), we get a palindrome (458282854).

The spelling of 343240511 in words is "three hundred forty-three million, two hundred forty thousand, five hundred eleven".