6996221 has 4 divisors (see below), whose sum is σ = 7237500. Its totient is φ = 6754944.

The previous prime is 6996217. The next prime is 6996233. The reversal of 6996221 is 1226996.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3705625 + 3290596 = 1925^2 + 1814^2 .

It is a cyclic number.

It is not a de Polignac number, because 6996221 - 2² = 6996217 is a prime.

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 (6996211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120596 + ... + 120653.

It is an arithmetic number, because the mean of its divisors is an integer number (1809375).

Almost surely, 2^6996221 is an apocalyptic number.

It is an amenable number.

6996221 is a deficient number, since it is larger than the sum of its proper divisors (241279).

6996221 is a wasteful number, since it uses less digits than its factorization.

6996221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241278.

The product of its digits is 11664, while the sum is 35.

The square root of 6996221 is about 2645.0370507802. The cubic root of 6996221 is about 191.2586884287.

The spelling of 6996221 in words is "six million, nine hundred ninety-six thousand, two hundred twenty-one".