201522065 has 4 divisors (see below), whose sum is σ = 241826484. Its totient is φ = 161217648.

The previous prime is 201522049. The next prime is 201522089. The reversal of 201522065 is 560225102.

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 135652609 + 65869456 = 11647^2 + 8116^2 .

It is a cyclic number.

It is not a de Polignac number, because 201522065 - 2⁴ = 201522049 is a prime.

It is a super-2 number, since 2×201522065² = 81222285363728450, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 201522065.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20152202 + ... + 20152211.

It is an arithmetic number, because the mean of its divisors is an integer number (60456621).

Almost surely, 2^201522065 is an apocalyptic number.

It is an amenable number.

201522065 is a deficient number, since it is larger than the sum of its proper divisors (40304419).

201522065 is an equidigital number, since it uses as much as digits as its factorization.

201522065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40304418.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 201522065 is about 14195.8467517792. The cubic root of 201522065 is about 586.2833151493.

Adding to 201522065 its reverse (560225102), we get a palindrome (761747167).

The spelling of 201522065 in words is "two hundred one million, five hundred twenty-two thousand, sixty-five".