213564265 has 8 divisors (see below), whose sum is σ = 265114440. Its totient is φ = 164959872.

The previous prime is 213564257. The next prime is 213564317. The reversal of 213564265 is 562465312.

It can be written as a sum of positive squares in 4 ways, for example, as 82944 + 213481321 = 288^2 + 14611^2 .

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 213564265 - 2³ = 213564257 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 213564265.

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 7 ways as a sum of consecutive naturals, for example, 736284 + ... + 736573.

It is an arithmetic number, because the mean of its divisors is an integer number (33139305).

Almost surely, 2^213564265 is an apocalyptic number.

It is an amenable number.

213564265 is a deficient number, since it is larger than the sum of its proper divisors (51550175).

213564265 is a wasteful number, since it uses less digits than its factorization.

213564265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1472891.

The product of its digits is 43200, while the sum is 34.

The square root of 213564265 is about 14613.8381337690. The cubic root of 213564265 is about 597.7361589302.

The spelling of 213564265 in words is "two hundred thirteen million, five hundred sixty-four thousand, two hundred sixty-five".