8231055921 has 16 divisors (see below), whose sum is σ = 13302717120. Its totient is φ = 4988518560.

The previous prime is 8231055881. The next prime is 8231055941. The reversal of 8231055921 is 1295501328.

8231055921 is a `hidden beast` number, since 82 + 3 + 1 + 0 + 559 + 21 = 666.

It is not a de Polignac number, because 8231055921 - 2⁶ = 8231055857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8231055941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13856700 + ... + 13857293.

It is an arithmetic number, because the mean of its divisors is an integer number (831419820).

Almost surely, 2^8231055921 is an apocalyptic number.

It is an amenable number.

8231055921 is a deficient number, since it is larger than the sum of its proper divisors (5071661199).

8231055921 is a wasteful number, since it uses less digits than its factorization.

8231055921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27714013 (or 27714007 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 8231055921 is about 90725.1669659527. The cubic root of 8231055921 is about 2019.0722074107.

The spelling of 8231055921 in words is "eight billion, two hundred thirty-one million, fifty-five thousand, nine hundred twenty-one".