8215820983 has 4 divisors (see below), whose sum is σ = 8216205480. Its totient is φ = 8215436488.

The previous prime is 8215820923. The next prime is 8215820999. The reversal of 8215820983 is 3890285128.

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

It is a cyclic number.

It is not a de Polignac number, because 8215820983 - 2⁹ = 8215820471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8215820903) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 158185 + ... + 203602.

It is an arithmetic number, because the mean of its divisors is an integer number (2054051370).

Almost surely, 2^8215820983 is an apocalyptic number.

8215820983 is a deficient number, since it is larger than the sum of its proper divisors (384497).

8215820983 is a wasteful number, since it uses less digits than its factorization.

8215820983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384496.

The product of its (nonzero) digits is 276480, while the sum is 46.

The square root of 8215820983 is about 90641.1660505314. The cubic root of 8215820983 is about 2017.8257315437.

The spelling of 8215820983 in words is "eight billion, two hundred fifteen million, eight hundred twenty thousand, nine hundred eighty-three".