421344343 has 16 divisors (see below), whose sum is σ = 501497856. Its totient is φ = 346389120.

The previous prime is 421344293. The next prime is 421344373. The reversal of 421344343 is 343443124.

It is not a de Polignac number, because 421344343 - 2¹⁷ = 421213271 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 (421344373) 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, 15930 + ... + 33112.

It is an arithmetic number, because the mean of its divisors is an integer number (31343616).

Almost surely, 2^421344343 is an apocalyptic number.

421344343 is a deficient number, since it is larger than the sum of its proper divisors (80153513).

421344343 is a wasteful number, since it uses less digits than its factorization.

421344343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17334.

The product of its digits is 13824, while the sum is 28.

The square root of 421344343 is about 20526.6739390482. The cubic root of 421344343 is about 749.6854046507.

Adding to 421344343 its reverse (343443124), we get a palindrome (764787467).

The spelling of 421344343 in words is "four hundred twenty-one million, three hundred forty-four thousand, three hundred forty-three".