8213580842 has 4 divisors (see below), whose sum is σ = 12320371266. Its totient is φ = 4106790420.

The previous prime is 8213580841. The next prime is 8213580847. The reversal of 8213580842 is 2480853128.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 6032784241 + 2180796601 = 77671^2 + 46699^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 8213580842.

It is not an unprimeable number, because it can be changed into a prime (8213580841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2053395209 + ... + 2053395212.

Almost surely, 2^8213580842 is an apocalyptic number.

8213580842 is a deficient number, since it is larger than the sum of its proper divisors (4106790424).

8213580842 is a wasteful number, since it uses less digits than its factorization.

8213580842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4106790423.

The product of its (nonzero) digits is 122880, while the sum is 41.

The square root of 8213580842 is about 90628.8080137878. The cubic root of 8213580842 is about 2017.6423201697.

The spelling of 8213580842 in words is "eight billion, two hundred thirteen million, five hundred eighty thousand, eight hundred forty-two".