201533123 has 6 divisors (see below), whose sum is σ = 221520012. Its totient is φ = 183211820.

The previous prime is 201533099. The next prime is 201533141. The reversal of 201533123 is 321335102.

It is not a de Polignac number, because 201533123 - 2¹⁴ = 201516739 is a prime.

It is a super-2 number, since 2×201533123² = 81231199332266258, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201533095 and 201533104.

It is not an unprimeable number, because it can be changed into a prime (201533173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 832661 + ... + 832902.

It is an arithmetic number, because the mean of its divisors is an integer number (36920002).

Almost surely, 2^201533123 is an apocalyptic number.

201533123 is a deficient number, since it is larger than the sum of its proper divisors (19986889).

201533123 is a wasteful number, since it uses less digits than its factorization.

201533123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1665585 (or 1665574 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 201533123 is about 14196.2362265496. The cubic root of 201533123 is about 586.2940385447.

Adding to 201533123 its reverse (321335102), we get a palindrome (522868225).

The spelling of 201533123 in words is "two hundred one million, five hundred thirty-three thousand, one hundred twenty-three".