213424465 has 4 divisors (see below), whose sum is σ = 256109364. Its totient is φ = 170739568.

The previous prime is 213424451. The next prime is 213424469. The reversal of 213424465 is 564424312.

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 138203536 + 75220929 = 11756^2 + 8673^2 .

It is a cyclic number.

It is not a de Polignac number, because 213424465 - 2²⁷ = 79206737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213424469) 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, 21342442 + ... + 21342451.

It is an arithmetic number, because the mean of its divisors is an integer number (64027341).

Almost surely, 2^213424465 is an apocalyptic number.

It is an amenable number.

213424465 is a deficient number, since it is larger than the sum of its proper divisors (42684899).

213424465 is an equidigital number, since it uses as much as digits as its factorization.

213424465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42684898.

The product of its digits is 23040, while the sum is 31.

The square root of 213424465 is about 14609.0542130557. The cubic root of 213424465 is about 597.6057036543.

Adding to 213424465 its reverse (564424312), we get a palindrome (777848777).

The spelling of 213424465 in words is "two hundred thirteen million, four hundred twenty-four thousand, four hundred sixty-five".