8216279249 has 4 divisors (see below), whose sum is σ = 8225867364. Its totient is φ = 8206691136.

The previous prime is 8216279243. The next prime is 8216279251. The reversal of 8216279249 is 9429726128.

8216279249 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5425059025 + 2791220224 = 73655^2 + 52832^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8216279249 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8216279197 and 8216279206.

It is not an unprimeable number, because it can be changed into a prime (8216279243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4792772 + ... + 4794485.

It is an arithmetic number, because the mean of its divisors is an integer number (2056466841).

Almost surely, 2^8216279249 is an apocalyptic number.

It is an amenable number.

8216279249 is a deficient number, since it is larger than the sum of its proper divisors (9588115).

8216279249 is an equidigital number, since it uses as much as digits as its factorization.

8216279249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9588114.

The product of its digits is 870912, while the sum is 50.

The square root of 8216279249 is about 90643.6939284802. The cubic root of 8216279249 is about 2017.8632479297.

The spelling of 8216279249 in words is "eight billion, two hundred sixteen million, two hundred seventy-nine thousand, two hundred forty-nine".