6922221 has 4 divisors (see below), whose sum is σ = 9229632. Its totient is φ = 4614812.

The previous prime is 6922193. The next prime is 6922229. The reversal of 6922221 is 1222296.

6922221 = 873² + 874² + ... + 881².

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 6922221 - 2⁵ = 6922189 is a prime.

It is a D-number.

6922221 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 6922191 and 6922200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6922229) 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, 1153701 + ... + 1153706.

It is an arithmetic number, because the mean of its divisors is an integer number (2307408).

Almost surely, 2^6922221 is an apocalyptic number.

It is an amenable number.

6922221 is a deficient number, since it is larger than the sum of its proper divisors (2307411).

6922221 is a wasteful number, since it uses less digits than its factorization.

6922221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2307410.

The product of its digits is 864, while the sum is 24.

The square root of 6922221 is about 2631.0114024838. The cubic root of 6922221 is about 190.5819736628.

The spelling of 6922221 in words is "six million, nine hundred twenty-two thousand, two hundred twenty-one".