202323421543 has 4 divisors (see below), whose sum is σ = 202451233248. Its totient is φ = 202195609840.

The previous prime is 202323421537. The next prime is 202323421591. The reversal of 202323421543 is 345124323202.

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 202323421543 - 2³⁷ = 64884468071 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202323421513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63903478 + ... + 63906643.

It is an arithmetic number, because the mean of its divisors is an integer number (50612808312).

Almost surely, 2^202323421543 is an apocalyptic number.

202323421543 is a deficient number, since it is larger than the sum of its proper divisors (127811705).

202323421543 is a wasteful number, since it uses less digits than its factorization.

202323421543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127811704.

The product of its (nonzero) digits is 34560, while the sum is 31.

Adding to 202323421543 its reverse (345124323202), we get a palindrome (547447744745).

The spelling of 202323421543 in words is "two hundred two billion, three hundred twenty-three million, four hundred twenty-one thousand, five hundred forty-three".