201023533 has 8 divisors (see below), whose sum is σ = 206551800. Its totient is φ = 195525120.

The previous prime is 201023527. The next prime is 201023549. The reversal of 201023533 is 335320102.

It can be written as a sum of positive squares in 4 ways, for example, as 6086089 + 194937444 = 2467^2 + 13962^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 201023533 - 2¹³ = 201015341 is a prime.

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 201023533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201023503) 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, 6543 + ... + 21091.

It is an arithmetic number, because the mean of its divisors is an integer number (25818975).

Almost surely, 2^201023533 is an apocalyptic number.

It is an amenable number.

201023533 is a deficient number, since it is larger than the sum of its proper divisors (5528267).

201023533 is a wasteful number, since it uses less digits than its factorization.

201023533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14927.

The product of its (nonzero) digits is 540, while the sum is 19.

The square root of 201023533 is about 14178.2767993857. The cubic root of 201023533 is about 585.7994602033.

Adding to 201023533 its reverse (335320102), we get a palindrome (536343635).

The spelling of 201023533 in words is "two hundred one million, twenty-three thousand, five hundred thirty-three".