8501221057 has 8 divisors (see below), whose sum is σ = 9718677632. Its totient is φ = 7284513600.

The previous prime is 8501221049. The next prime is 8501221097. The reversal of 8501221057 is 7501221058.

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

It is not a de Polignac number, because 8501221057 - 2³ = 8501221049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8501221097) 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 7 ways as a sum of consecutive naturals, for example, 162744 + ... + 208537.

It is an arithmetic number, because the mean of its divisors is an integer number (1214834704).

Almost surely, 2^8501221057 is an apocalyptic number.

It is an amenable number.

8501221057 is a deficient number, since it is larger than the sum of its proper divisors (1217456575).

8501221057 is a wasteful number, since it uses less digits than its factorization.

8501221057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374559.

The product of its (nonzero) digits is 5600, while the sum is 31.

The square root of 8501221057 is about 92202.0664464740. The cubic root of 8501221057 is about 2040.9252704665.

Subtracting from 8501221057 its reverse (7501221058), we obtain a palindrome (999999999).

The spelling of 8501221057 in words is "eight billion, five hundred one million, two hundred twenty-one thousand, fifty-seven".