202143538317 has 48 divisors (see below), whose sum is σ = 326080087872. Its totient is φ = 110974510080.

The previous prime is 202143538297. The next prime is 202143538321. The reversal of 202143538317 is 713835341202.

It is not a de Polignac number, because 202143538317 - 2⁷ = 202143538189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202143538367) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 123453 + ... + 647709.

It is an arithmetic number, because the mean of its divisors is an integer number (6793335164).

Almost surely, 2^202143538317 is an apocalyptic number.

It is an amenable number.

202143538317 is a deficient number, since it is larger than the sum of its proper divisors (123936549555).

202143538317 is a wasteful number, since it uses less digits than its factorization.

202143538317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 524378 (or 524371 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 39.

Adding to 202143538317 its reverse (713835341202), we get a palindrome (915978879519).

The spelling of 202143538317 in words is "two hundred two billion, one hundred forty-three million, five hundred thirty-eight thousand, three hundred seventeen".