8538221242 has 16 divisors (see below), whose sum is σ = 13071925152. Its totient is φ = 4181196240.

The previous prime is 8538221201. The next prime is 8538221257. The reversal of 8538221242 is 2421228358.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10008 + ... + 131059.

It is an arithmetic number, because the mean of its divisors is an integer number (816995322).

Almost surely, 2^8538221242 is an apocalyptic number.

8538221242 is a deficient number, since it is larger than the sum of its proper divisors (4533703910).

8538221242 is a wasteful number, since it uses less digits than its factorization.

8538221242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141693.

The product of its digits is 61440, while the sum is 37.

The square root of 8538221242 is about 92402.4958645598. The cubic root of 8538221242 is about 2043.8819171715.

The spelling of 8538221242 in words is "eight billion, five hundred thirty-eight million, two hundred twenty-one thousand, two hundred forty-two".