6575581221 has 8 divisors (see below), whose sum is σ = 9564481824. Its totient is φ = 3985200720.

The previous prime is 6575581163. The next prime is 6575581253. The reversal of 6575581221 is 1221855756.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6575581221 - 2⁹ = 6575580709 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6575581261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99629986 + ... + 99630051.

It is an arithmetic number, because the mean of its divisors is an integer number (1195560228).

Almost surely, 2^6575581221 is an apocalyptic number.

It is an amenable number.

6575581221 is a deficient number, since it is larger than the sum of its proper divisors (2988900603).

6575581221 is a wasteful number, since it uses less digits than its factorization.

6575581221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199260051.

The product of its digits is 168000, while the sum is 42.

The square root of 6575581221 is about 81089.9575841546. The cubic root of 6575581221 is about 1873.4612533189.

The spelling of 6575581221 in words is "six billion, five hundred seventy-five million, five hundred eighty-one thousand, two hundred twenty-one".