8162182821 has 16 divisors (see below), whose sum is σ = 11724130880. Its totient is φ = 5021136000.

The previous prime is 8162182813. The next prime is 8162182829. The reversal of 8162182821 is 1282812618.

It is an interprime number because it is at equal distance from previous prime (8162182813) and next prime (8162182829).

It is not a de Polignac number, because 8162182821 - 2³ = 8162182813 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8162182821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8162182829) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82170 + ... + 151908.

It is an arithmetic number, because the mean of its divisors is an integer number (732758180).

Almost surely, 2^8162182821 is an apocalyptic number.

It is an amenable number.

8162182821 is a deficient number, since it is larger than the sum of its proper divisors (3561948059).

8162182821 is a wasteful number, since it uses less digits than its factorization.

8162182821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72756.

The product of its digits is 24576, while the sum is 39.

The square root of 8162182821 is about 90344.7996345113. The cubic root of 8162182821 is about 2013.4249192259.

The spelling of 8162182821 in words is "eight billion, one hundred sixty-two million, one hundred eighty-two thousand, eight hundred twenty-one".