201005523 has 8 divisors (see below), whose sum is σ = 297786000. Its totient is φ = 134003664.

The previous prime is 201005513. The next prime is 201005527. The reversal of 201005523 is 325500102.

It is a happy number.

It is not a de Polignac number, because 201005523 - 2¹⁰ = 201004499 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201005496 and 201005505.

It is not an unprimeable number, because it can be changed into a prime (201005527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3722298 + ... + 3722351.

It is an arithmetic number, because the mean of its divisors is an integer number (37223250).

Almost surely, 2^201005523 is an apocalyptic number.

201005523 is a deficient number, since it is larger than the sum of its proper divisors (96780477).

201005523 is an equidigital number, since it uses as much as digits as its factorization.

201005523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7444658 (or 7444652 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 201005523 is about 14177.6416586116. The cubic root of 201005523 is about 585.7819654633.

Adding to 201005523 its reverse (325500102), we get a palindrome (526505625).

The spelling of 201005523 in words is "two hundred one million, five thousand, five hundred twenty-three".