343424421 has 16 divisors (see below), whose sum is σ = 510525120. Its totient is φ = 228162960.

The previous prime is 343424377. The next prime is 343424423. The reversal of 343424421 is 124424343.

It is a happy number.

It is not a de Polignac number, because 343424421 - 2⁶ = 343424357 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (343424423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13795 + ... + 29616.

It is an arithmetic number, because the mean of its divisors is an integer number (31907820).

Almost surely, 2^343424421 is an apocalyptic number.

It is an amenable number.

343424421 is a deficient number, since it is larger than the sum of its proper divisors (167100699).

343424421 is a wasteful number, since it uses less digits than its factorization.

343424421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43713 (or 43707 counting only the distinct ones).

The product of its digits is 9216, while the sum is 27.

The square root of 343424421 is about 18531.7139250529. The cubic root of 343424421 is about 700.2886027644.

Adding to 343424421 its reverse (124424343), we get a palindrome (467848764).

The spelling of 343424421 in words is "three hundred forty-three million, four hundred twenty-four thousand, four hundred twenty-one".