6221821093 has 4 divisors (see below), whose sum is σ = 6309452448. Its totient is φ = 6134189740.

The previous prime is 6221821079. The next prime is 6221821129. The reversal of 6221821093 is 3901281226.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6221821093 - 2⁵ = 6221821061 is a prime.

It is a super-2 number, since 2×6221821093² = 77422115426599429298, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6221821013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43815571 + ... + 43815712.

It is an arithmetic number, because the mean of its divisors is an integer number (1577363112).

Almost surely, 2^6221821093 is an apocalyptic number.

It is an amenable number.

6221821093 is a deficient number, since it is larger than the sum of its proper divisors (87631355).

6221821093 is an equidigital number, since it uses as much as digits as its factorization.

6221821093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87631354.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 6221821093 is about 78878.5211131649. The cubic root of 6221821093 is about 1839.2432589365.

The spelling of 6221821093 in words is "six billion, two hundred twenty-one million, eight hundred twenty-one thousand, ninety-three".