7822967221 has 8 divisors (see below), whose sum is σ = 7928566488. Its totient is φ = 7717920000.

The previous prime is 7822967213. The next prime is 7822967233. The reversal of 7822967221 is 1227692287.

It can be written as a sum of positive squares in 4 ways, for example, as 6578994321 + 1243972900 = 81111^2 + 35270^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7822967221 - 2³ = 7822967213 is a prime.

It is a super-2 number, since 2×7822967221² (a number of 21 digits) 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 (7822967821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109440 + ... + 166201.

It is an arithmetic number, because the mean of its divisors is an integer number (991070811).

Almost surely, 2^7822967221 is an apocalyptic number.

It is an amenable number.

7822967221 is a deficient number, since it is larger than the sum of its proper divisors (105599267).

7822967221 is a wasteful number, since it uses less digits than its factorization.

7822967221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276023.

The product of its digits is 338688, while the sum is 46.

The square root of 7822967221 is about 88447.5393722177. The cubic root of 7822967221 is about 1985.1370889634.

The spelling of 7822967221 in words is "seven billion, eight hundred twenty-two million, nine hundred sixty-seven thousand, two hundred twenty-one".