423212005 has 4 divisors (see below), whose sum is σ = 507854412. Its totient is φ = 338569600.

The previous prime is 423211967. The next prime is 423212033. The reversal of 423212005 is 500212324.

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

It can be written as a sum of positive squares in 2 ways, for example, as 336759201 + 86452804 = 18351^2 + 9298^2 .

It is not a de Polignac number, because 423212005 - 2¹¹ = 423209957 is a prime.

It is a super-2 number, since 2×423212005² = 358216802352240050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 42321196 + ... + 42321205.

It is an arithmetic number, because the mean of its divisors is an integer number (126963603).

Almost surely, 2^423212005 is an apocalyptic number.

It is an amenable number.

423212005 is a deficient number, since it is larger than the sum of its proper divisors (84642407).

423212005 is an equidigital number, since it uses as much as digits as its factorization.

423212005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84642406.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 423212005 is about 20572.1171734948. The cubic root of 423212005 is about 750.7914637456.

Adding to 423212005 its reverse (500212324), we get a palindrome (923424329).

The spelling of 423212005 in words is "four hundred twenty-three million, two hundred twelve thousand, five".