405344315221 has 8 divisors (see below), whose sum is σ = 411876218880. Its totient is φ = 398847435792.

The previous prime is 405344315209. The next prime is 405344315261. The reversal of 405344315221 is 122513443504.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 405344315221 - 2⁷ = 405344315093 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 (405344315261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8732725 + ... + 8779018.

It is an arithmetic number, because the mean of its divisors is an integer number (51484527360).

Almost surely, 2^405344315221 is an apocalyptic number.

It is an amenable number.

405344315221 is a deficient number, since it is larger than the sum of its proper divisors (6531903659).

405344315221 is a wasteful number, since it uses less digits than its factorization.

405344315221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17512115.

The product of its (nonzero) digits is 57600, while the sum is 34.

Adding to 405344315221 its reverse (122513443504), we get a palindrome (527857758725).

The spelling of 405344315221 in words is "four hundred five billion, three hundred forty-four million, three hundred fifteen thousand, two hundred twenty-one".