82303821 has 24 divisors (see below), whose sum is σ = 125361600. Its totient is φ = 51929856.

The previous prime is 82303811. The next prime is 82303841. The reversal of 82303821 is 12830328.

It is not a de Polignac number, because 82303821 - 2⁶ = 82303757 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82303811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18030 + ... + 22128.

It is an arithmetic number, because the mean of its divisors is an integer number (5223400).

Almost surely, 2^82303821 is an apocalyptic number.

It is an amenable number.

82303821 is a deficient number, since it is larger than the sum of its proper divisors (43057779).

82303821 is a wasteful number, since it uses less digits than its factorization.

82303821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4225 (or 4222 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 82303821 is about 9072.1453361374. The cubic root of 82303821 is about 434.9840501484.

The spelling of 82303821 in words is "eighty-two million, three hundred three thousand, eight hundred twenty-one".