8220947542 has 16 divisors (see below), whose sum is σ = 12363657264. Its totient is φ = 4099744000.

The previous prime is 8220947479. The next prime is 8220947593. The reversal of 8220947542 is 2457490228.

It is a happy number.

It is a congruent number.

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, 1337817 + ... + 1343947.

It is an arithmetic number, because the mean of its divisors is an integer number (772728579).

Almost surely, 2^8220947542 is an apocalyptic number.

8220947542 is a deficient number, since it is larger than the sum of its proper divisors (4142709722).

8220947542 is a wasteful number, since it uses less digits than its factorization.

8220947542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7775.

The product of its (nonzero) digits is 322560, while the sum is 43.

The square root of 8220947542 is about 90669.4410592676. The cubic root of 8220947542 is about 2018.2453427557.

The spelling of 8220947542 in words is "eight billion, two hundred twenty million, nine hundred forty-seven thousand, five hundred forty-two".