8921285281 has 4 divisors (see below), whose sum is σ = 8928133312. Its totient is φ = 8914437252.

The previous prime is 8921285239. The next prime is 8921285297. The reversal of 8921285281 is 1825821298.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8921285281 - 2¹¹ = 8921283233 is a prime.

It is a super-2 number, since 2×8921285281² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8921285231) 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, 3422061 + ... + 3424666.

It is an arithmetic number, because the mean of its divisors is an integer number (2232033328).

Almost surely, 2^8921285281 is an apocalyptic number.

It is an amenable number.

8921285281 is a deficient number, since it is larger than the sum of its proper divisors (6848031).

8921285281 is a wasteful number, since it uses less digits than its factorization.

8921285281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6848030.

The product of its digits is 184320, while the sum is 46.

The square root of 8921285281 is about 94452.5557144962. Note that the first 3 decimals coincide. The cubic root of 8921285281 is about 2074.0018642421.

The spelling of 8921285281 in words is "eight billion, nine hundred twenty-one million, two hundred eighty-five thousand, two hundred eighty-one".