405343321 has 16 divisors (see below), whose sum is σ = 443699200. Its totient is φ = 368874000.

The previous prime is 405343319. The next prime is 405343339. The reversal of 405343321 is 123343504.

It is a cyclic number.

It is not a de Polignac number, because 405343321 - 2¹ = 405343319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (405343721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79396 + ... + 84346.

It is an arithmetic number, because the mean of its divisors is an integer number (27731200).

Almost surely, 2^405343321 is an apocalyptic number.

It is an amenable number.

405343321 is a deficient number, since it is larger than the sum of its proper divisors (38355879).

405343321 is a wasteful number, since it uses less digits than its factorization.

405343321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5140.

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 405343321 is about 20133.1398693795. The cubic root of 405343321 is about 740.0726255724.

Adding to 405343321 its reverse (123343504), we get a palindrome (528686825).

It can be divided in two parts, 4053 and 43321, that added together give a palindrome (47374).

The spelling of 405343321 in words is "four hundred five million, three hundred forty-three thousand, three hundred twenty-one".