82820051 has 4 divisors (see below), whose sum is σ = 82999392. Its totient is φ = 82640712.

The previous prime is 82820047. The next prime is 82820071. The reversal of 82820051 is 15002828.

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 82820051 - 2² = 82820047 is a prime.

It is a super-3 number, since 3×82820051³ (a number of 25 digits) contains 333 as substring.

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 82820051.

It is not an unprimeable number, because it can be changed into a prime (82820071) 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, 88976 + ... + 89901.

It is an arithmetic number, because the mean of its divisors is an integer number (20749848).

Almost surely, 2^82820051 is an apocalyptic number.

82820051 is a deficient number, since it is larger than the sum of its proper divisors (179341).

82820051 is a wasteful number, since it uses less digits than its factorization.

82820051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179340.

The product of its (nonzero) digits is 1280, while the sum is 26.

The square root of 82820051 is about 9100.5522359910. The cubic root of 82820051 is about 435.8915979838.

Adding to 82820051 its reverse (15002828), we get a palindrome (97822879).

The spelling of 82820051 in words is "eighty-two million, eight hundred twenty thousand, fifty-one".