8231021 has 2 divisors, whose sum is σ = 8231022. Its totient is φ = 8231020.

The previous prime is 8230979. The next prime is 8231087. The reversal of 8231021 is 1201328.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7761796 + 469225 = 2786^2 + 685^2 .

It is a cyclic number.

It is not a de Polignac number, because 8231021 - 2²² = 4036717 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8231221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4115510 + 4115511.

It is an arithmetic number, because the mean of its divisors is an integer number (4115511).

Almost surely, 2^8231021 is an apocalyptic number.

It is an amenable number.

8231021 is a deficient number, since it is larger than the sum of its proper divisors (1).

8231021 is an equidigital number, since it uses as much as digits as its factorization.

8231021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 8231021 is about 2868.9756011510. The cubic root of 8231021 is about 201.9069352041.

Adding to 8231021 its reverse (1201328), we get a palindrome (9432349).

The spelling of 8231021 in words is "eight million, two hundred thirty-one thousand, twenty-one".