8653040221 has 4 divisors (see below), whose sum is σ = 9889188832. Its totient is φ = 7416891612.

The previous prime is 8653040203. The next prime is 8653040257. The reversal of 8653040221 is 1220403568.

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 8653040221 - 2¹⁵ = 8653007453 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 (8653040281) 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, 618074295 + ... + 618074308.

It is an arithmetic number, because the mean of its divisors is an integer number (2472297208).

Almost surely, 2^8653040221 is an apocalyptic number.

It is an amenable number.

8653040221 is a deficient number, since it is larger than the sum of its proper divisors (1236148611).

8653040221 is a wasteful number, since it uses less digits than its factorization.

8653040221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1236148610.

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 8653040221 is about 93021.7190821584. The cubic root of 8653040221 is about 2053.0029533917.

Adding to 8653040221 its reverse (1220403568), we get a palindrome (9873443789).

The spelling of 8653040221 in words is "eight billion, six hundred fifty-three million, forty thousand, two hundred twenty-one".