201320523 has 24 divisors (see below), whose sum is σ = 316664400. Its totient is φ = 122762304.

The previous prime is 201320521. The next prime is 201320533. The reversal of 201320523 is 325023102.

It is not a de Polignac number, because 201320523 - 2¹ = 201320521 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201320496 and 201320505.

It is not an unprimeable number, because it can be changed into a prime (201320521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15340 + ... + 25257.

It is an arithmetic number, because the mean of its divisors is an integer number (13194350).

Almost surely, 2^201320523 is an apocalyptic number.

201320523 is a deficient number, since it is larger than the sum of its proper divisors (115343877).

201320523 is a wasteful number, since it uses less digits than its factorization.

201320523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40651 (or 40648 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 201320523 is about 14188.7463505413. The cubic root of 201320523 is about 586.0878028538.

Adding to 201320523 its reverse (325023102), we get a palindrome (526343625).

The spelling of 201320523 in words is "two hundred one million, three hundred twenty thousand, five hundred twenty-three".