405524423 has 4 divisors (see below), whose sum is σ = 418605888. Its totient is φ = 392442960.

The previous prime is 405524411. The next prime is 405524437. The reversal of 405524423 is 324425504.

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 405524423 - 2⁸ = 405524167 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 (405524453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6540686 + ... + 6540747.

It is an arithmetic number, because the mean of its divisors is an integer number (104651472).

Almost surely, 2^405524423 is an apocalyptic number.

405524423 is a deficient number, since it is larger than the sum of its proper divisors (13081465).

405524423 is a wasteful number, since it uses less digits than its factorization.

405524423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13081464.

The product of its (nonzero) digits is 19200, while the sum is 29.

The square root of 405524423 is about 20137.6369765670. The cubic root of 405524423 is about 740.1828273609.

Adding to 405524423 its reverse (324425504), we get a palindrome (729949927).

The spelling of 405524423 in words is "four hundred five million, five hundred twenty-four thousand, four hundred twenty-three".