213147565 has 8 divisors (see below), whose sum is σ = 262690200. Its totient is φ = 165909312.

The previous prime is 213147563. The next prime is 213147577. The reversal of 213147565 is 565741312.

It can be written as a sum of positive squares in 4 ways, for example, as 11819844 + 201327721 = 3438^2 + 14189^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 213147565 - 2¹ = 213147563 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 213147565.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213147563) 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 7 ways as a sum of consecutive naturals, for example, 575890 + ... + 576259.

It is an arithmetic number, because the mean of its divisors is an integer number (32836275).

Almost surely, 2^213147565 is an apocalyptic number.

It is an amenable number.

213147565 is a deficient number, since it is larger than the sum of its proper divisors (49542635).

213147565 is a wasteful number, since it uses less digits than its factorization.

213147565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1152191.

The product of its digits is 25200, while the sum is 34.

The square root of 213147565 is about 14599.5741376247. The cubic root of 213147565 is about 597.3471443633.

Adding to 213147565 its reverse (565741312), we get a palindrome (778888877).

The spelling of 213147565 in words is "two hundred thirteen million, one hundred forty-seven thousand, five hundred sixty-five".