201522005 has 4 divisors (see below), whose sum is σ = 241826412. Its totient is φ = 161217600.

The previous prime is 201521977. The next prime is 201522019. The reversal of 201522005 is 500225102.

201522005 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 129458884 + 72063121 = 11378^2 + 8489^2 .

It is not a de Polignac number, because 201522005 - 2⁶ = 201521941 is a prime.

It is a super-2 number, since 2×201522005² = 81222236998440050, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent 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, 20152196 + ... + 20152205.

It is an arithmetic number, because the mean of its divisors is an integer number (60456603).

Almost surely, 2^201522005 is an apocalyptic number.

It is an amenable number.

201522005 is a deficient number, since it is larger than the sum of its proper divisors (40304407).

201522005 is an equidigital number, since it uses as much as digits as its factorization.

201522005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40304406.

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 201522005 is about 14195.8446384849. The cubic root of 201522005 is about 586.2832569638.

Adding to 201522005 its reverse (500225102), we get a palindrome (701747107).

The spelling of 201522005 in words is "two hundred one million, five hundred twenty-two thousand, five".