405323505221 has 8 divisors (see below), whose sum is σ = 412259522400. Its totient is φ = 398389692400.

The previous prime is 405323505187. The next prime is 405323505239. The reversal of 405323505221 is 122505323504.

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 405323505221 - 2¹⁰ = 405323504197 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 (405373505221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 178055 + ... + 917796.

It is an arithmetic number, because the mean of its divisors is an integer number (51532440300).

Almost surely, 2^405323505221 is an apocalyptic number.

It is an amenable number.

405323505221 is a deficient number, since it is larger than the sum of its proper divisors (6936017179).

405323505221 is a wasteful number, since it uses less digits than its factorization.

405323505221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1102179.

The product of its (nonzero) digits is 36000, while the sum is 32.

Adding to 405323505221 its reverse (122505323504), we get a palindrome (527828828725).

The spelling of 405323505221 in words is "four hundred five billion, three hundred twenty-three million, five hundred five thousand, two hundred twenty-one".