8501221059 has 16 divisors (see below), whose sum is σ = 12166136352. Its totient is φ = 5261027328.

The previous prime is 8501221049. The next prime is 8501221097. The reversal of 8501221059 is 9501221058.

It is not a de Polignac number, because 8501221059 - 2¹² = 8501216963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8501221049) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1137994 + ... + 1145439.

It is an arithmetic number, because the mean of its divisors is an integer number (760383522).

Almost surely, 2^8501221059 is an apocalyptic number.

8501221059 is a deficient number, since it is larger than the sum of its proper divisors (3664915293).

8501221059 is a wasteful number, since it uses less digits than its factorization.

8501221059 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2283526.

The product of its (nonzero) digits is 7200, while the sum is 33.

The square root of 8501221059 is about 92202.0664573197. The cubic root of 8501221059 is about 2040.9252706266.

Subtracting 8501221059 from its reverse (9501221058), we obtain a palindrome (999999999).

The spelling of 8501221059 in words is "eight billion, five hundred one million, two hundred twenty-one thousand, fifty-nine".