201522523 has 2 divisors, whose sum is σ = 201522524. Its totient is φ = 201522522.

The previous prime is 201522521. The next prime is 201522551. The reversal of 201522523 is 325225102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 201522523 - 2¹ = 201522521 is a prime.

It is a super-3 number, since 3×201522523³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 201522521, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 201522494 and 201522503.

It is not a weakly prime, because it can be changed into another prime (201522521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100761261 + 100761262.

It is an arithmetic number, because the mean of its divisors is an integer number (100761262).

Almost surely, 2^201522523 is an apocalyptic number.

201522523 is a deficient number, since it is larger than the sum of its proper divisors (1).

201522523 is an equidigital number, since it uses as much as digits as its factorization.

201522523 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 201522523 is about 14195.8628832488. The cubic root of 201522523 is about 586.2837592985.

Adding to 201522523 its reverse (325225102), we get a palindrome (526747625).

The spelling of 201522523 in words is "two hundred one million, five hundred twenty-two thousand, five hundred twenty-three".