8275506821 has 4 divisors (see below), whose sum is σ = 8467960512. Its totient is φ = 8083053132.

The previous prime is 8275506803. The next prime is 8275506937. The reversal of 8275506821 is 1286055728.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8275506821 - 2²⁶ = 8208397957 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 (8275566821) 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, 96226781 + ... + 96226866.

It is an arithmetic number, because the mean of its divisors is an integer number (2116990128).

Almost surely, 2^8275506821 is an apocalyptic number.

It is an amenable number.

8275506821 is a deficient number, since it is larger than the sum of its proper divisors (192453691).

8275506821 is a wasteful number, since it uses less digits than its factorization.

8275506821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192453690.

The product of its (nonzero) digits is 268800, while the sum is 44.

The square root of 8275506821 is about 90969.8126908042. The cubic root of 8275506821 is about 2022.7002756992.

The spelling of 8275506821 in words is "eight billion, two hundred seventy-five million, five hundred six thousand, eight hundred twenty-one".