405211423 has 4 divisors (see below), whose sum is σ = 426538360. Its totient is φ = 383884488.

The previous prime is 405211421. The next prime is 405211441. The reversal of 405211423 is 324112504.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 405211423 - 2¹ = 405211421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 405211394 and 405211403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405211421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10663440 + ... + 10663477.

It is an arithmetic number, because the mean of its divisors is an integer number (106634590).

Almost surely, 2^405211423 is an apocalyptic number.

405211423 is a deficient number, since it is larger than the sum of its proper divisors (21326937).

405211423 is a wasteful number, since it uses less digits than its factorization.

405211423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21326936.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 405211423 is about 20129.8639588051. The cubic root of 405211423 is about 739.9923440893.

Adding to 405211423 its reverse (324112504), we get a palindrome (729323927).

The spelling of 405211423 in words is "four hundred five million, two hundred eleven thousand, four hundred twenty-three".