6621233 has 2 divisors, whose sum is σ = 6621234. Its totient is φ = 6621232.

The previous prime is 6621191. The next prime is 6621239. The reversal of 6621233 is 3321266.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3621409 + 2999824 = 1903^2 + 1732^2 .

It is a cyclic number.

It is not a de Polignac number, because 6621233 - 2¹⁰ = 6620209 is a prime.

It is equal to p₄₅₂₅₃₄ and since 6621233 and 452534 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 6621199 and 6621208.

It is not a weakly prime, because it can be changed into another prime (6621239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3310616 + 3310617.

It is an arithmetic number, because the mean of its divisors is an integer number (3310617).

Almost surely, 2^6621233 is an apocalyptic number.

It is an amenable number.

6621233 is a deficient number, since it is larger than the sum of its proper divisors (1).

6621233 is an equidigital number, since it uses as much as digits as its factorization.

6621233 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 23.

The square root of 6621233 is about 2573.1756644271. The cubic root of 6621233 is about 187.7786836578.

Adding to 6621233 its reverse (3321266), we get a palindrome (9942499).

The spelling of 6621233 in words is "six million, six hundred twenty-one thousand, two hundred thirty-three".