213008565 has 64 divisors (see below), whose sum is σ = 426995712. Its totient is φ = 88089600.

The previous prime is 213008561. The next prime is 213008581. The reversal of 213008565 is 565800312.

It is not a de Polignac number, because 213008565 - 2² = 213008561 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213008561) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 358909 + ... + 359501.

It is an arithmetic number, because the mean of its divisors is an integer number (6671808).

Almost surely, 2^213008565 is an apocalyptic number.

It is an amenable number.

213008565 is an abundant number, since it is smaller than the sum of its proper divisors (213987147).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213008565 is a wasteful number, since it uses less digits than its factorization.

213008565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 930.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 213008565 is about 14594.8129484416. The cubic root of 213008565 is about 597.2172667225.

Adding to 213008565 its reverse (565800312), we get a palindrome (778808877).

The spelling of 213008565 in words is "two hundred thirteen million, eight thousand, five hundred sixty-five".