6223039821 has 6 divisors (see below), whose sum is σ = 8988835310. Its totient is φ = 4148693208.

The previous prime is 6223039793. The next prime is 6223039853. The reversal of 6223039821 is 1289303226.

6223039821 is a `hidden beast` number, since 622 + 3 + 0 + 3 + 9 + 8 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 3759406596 + 2463633225 = 61314^2 + 49635^2 .

It is not a de Polignac number, because 6223039821 - 2⁹ = 6223039309 is a prime.

It is a super-2 number, since 2×6223039821² = 77452449227503424082, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6223039861) 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 5 ways as a sum of consecutive naturals, for example, 345724426 + ... + 345724443.

Almost surely, 2^6223039821 is an apocalyptic number.

It is an amenable number.

6223039821 is a deficient number, since it is larger than the sum of its proper divisors (2765795489).

6223039821 is a wasteful number, since it uses less digits than its factorization.

6223039821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 691448875 (or 691448872 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 6223039821 is about 78886.2460825713. The cubic root of 6223039821 is about 1839.3633411913.

The spelling of 6223039821 in words is "six billion, two hundred twenty-three million, thirty-nine thousand, eight hundred twenty-one".