343278431 has 4 divisors (see below), whose sum is σ = 345748200. Its totient is φ = 340808664.

The previous prime is 343278413. The next prime is 343278437. The reversal of 343278431 is 134872343.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 134872343 = 8623 ⋅15641.

It is a cyclic number.

It is not a de Polignac number, because 343278431 - 2⁶ = 343278367 is a prime.

It is a super-2 number, since 2×343278431² = 235680162379643522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 343278391 and 343278400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (343278437) 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, 1234676 + ... + 1234953.

It is an arithmetic number, because the mean of its divisors is an integer number (86437050).

Almost surely, 2^343278431 is an apocalyptic number.

343278431 is a deficient number, since it is larger than the sum of its proper divisors (2469769).

343278431 is a wasteful number, since it uses less digits than its factorization.

343278431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2469768.

The product of its digits is 48384, while the sum is 35.

The square root of 343278431 is about 18527.7745830415. The cubic root of 343278431 is about 700.1893576156.

The spelling of 343278431 in words is "three hundred forty-three million, two hundred seventy-eight thousand, four hundred thirty-one".