6221623 has 4 divisors (see below), whose sum is σ = 6239800. Its totient is φ = 6203448.

The previous prime is 6221591. The next prime is 6221629. The reversal of 6221623 is 3261226.

It is a happy number.

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 6221623 - 2⁵ = 6221591 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6221594 and 6221603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6221629) 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 3 ways as a sum of consecutive naturals, for example, 8565 + ... + 9262.

It is an arithmetic number, because the mean of its divisors is an integer number (1559950).

Almost surely, 2^6221623 is an apocalyptic number.

6221623 is a deficient number, since it is larger than the sum of its proper divisors (18177).

6221623 is a wasteful number, since it uses less digits than its factorization.

6221623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18176.

The product of its digits is 864, while the sum is 22.

The square root of 6221623 is about 2494.3181433009. The cubic root of 6221623 is about 183.9223739192.

Adding to 6221623 its reverse (3261226), we get a palindrome (9482849).

The spelling of 6221623 in words is "six million, two hundred twenty-one thousand, six hundred twenty-three".