201340565 has 16 divisors (see below), whose sum is σ = 246345840. Its totient is φ = 157931520.

The previous prime is 201340547. The next prime is 201340603. The reversal of 201340565 is 565043102.

It can be written as a sum of positive squares in 8 ways, for example, as 9296401 + 192044164 = 3049^2 + 13858^2 .

It is not a de Polignac number, because 201340565 - 2²⁴ = 184563349 is a prime.

It is a super-2 number, since 2×201340565² = 81076046229038450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117797 + ... + 119493.

It is an arithmetic number, because the mean of its divisors is an integer number (15396615).

Almost surely, 2^201340565 is an apocalyptic number.

It is an amenable number.

201340565 is a deficient number, since it is larger than the sum of its proper divisors (45005275).

201340565 is a wasteful number, since it uses less digits than its factorization.

201340565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2152.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 201340565 is about 14189.4525969116. The cubic root of 201340565 is about 586.1072510812.

Adding to 201340565 its reverse (565043102), we get a palindrome (766383667).

The spelling of 201340565 in words is "two hundred one million, three hundred forty thousand, five hundred sixty-five".