202542023 has 4 divisors (see below), whose sum is σ = 202610280. Its totient is φ = 202473768.

The previous prime is 202541993. The next prime is 202542031. The reversal of 202542023 is 320245202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 202542023 - 2¹⁴ = 202525639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202541986 and 202542004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202542073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29465 + ... + 35682.

It is an arithmetic number, because the mean of its divisors is an integer number (50652570).

Almost surely, 2^202542023 is an apocalyptic number.

202542023 is a deficient number, since it is larger than the sum of its proper divisors (68257).

202542023 is an equidigital number, since it uses as much as digits as its factorization.

202542023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68256.

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 202542023 is about 14231.7259318749. The cubic root of 202542023 is about 587.2707642257.

Adding to 202542023 its reverse (320245202), we get a palindrome (522787225).

The spelling of 202542023 in words is "two hundred two million, five hundred forty-two thousand, twenty-three".