9872143281 has 216 divisors, whose sum is σ = 19845047040. Its totient is φ = 4625786880.

The previous prime is 9872143279. The next prime is 9872143297. The reversal of 9872143281 is 1823412789.

It is a happy number.

It is not a de Polignac number, because 9872143281 - 2¹ = 9872143279 is a prime.

It is a super-3 number, since 3×9872143281³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9872142281) by changing a digit.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 101774625 + ... + 101774721.

Almost surely, 2^9872143281 is an apocalyptic number.

9872143281 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

It is an amenable number.

9872143281 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

9872143281 is a wasteful number, since it uses less digits than its factorization.

9872143281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237 (or 210 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 9872143281 is about 99358.6598188603. The cubic root of 9872143281 is about 2145.2133121195.

The spelling of 9872143281 in words is "nine billion, eight hundred seventy-two million, one hundred forty-three thousand, two hundred eighty-one".