213697265 has 4 divisors (see below), whose sum is σ = 256436724. Its totient is φ = 170957808.

The previous prime is 213697247. The next prime is 213697271. The reversal of 213697265 is 562796312.

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 69288976 + 144408289 = 8324^2 + 12017^2 .

It is a cyclic number.

It is not a de Polignac number, because 213697265 - 2¹² = 213693169 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21369722 + ... + 21369731.

It is an arithmetic number, because the mean of its divisors is an integer number (64109181).

Almost surely, 2^213697265 is an apocalyptic number.

It is an amenable number.

213697265 is a deficient number, since it is larger than the sum of its proper divisors (42739459).

213697265 is an equidigital number, since it uses as much as digits as its factorization.

213697265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42739458.

The product of its digits is 136080, while the sum is 41.

The square root of 213697265 is about 14618.3879070163. The cubic root of 213697265 is about 597.8602159080.

The spelling of 213697265 in words is "two hundred thirteen million, six hundred ninety-seven thousand, two hundred sixty-five".