7822418221 has 4 divisors (see below), whose sum is σ = 7823225344. Its totient is φ = 7821611100.

The previous prime is 7822418213. The next prime is 7822418251. The reversal of 7822418221 is 1228142287.

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 7822418221 - 2³ = 7822418213 is a prime.

It is a super-2 number, since 2×7822418221² (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 (7822418251) 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, 388845 + ... + 408466.

It is an arithmetic number, because the mean of its divisors is an integer number (1955806336).

Almost surely, 2^7822418221 is an apocalyptic number.

It is an amenable number.

7822418221 is a deficient number, since it is larger than the sum of its proper divisors (807123).

7822418221 is an equidigital number, since it uses as much as digits as its factorization.

7822418221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 807122.

The product of its digits is 28672, while the sum is 37.

The square root of 7822418221 is about 88444.4357831514. The cubic root of 7822418221 is about 1985.0906502433.

The spelling of 7822418221 in words is "seven billion, eight hundred twenty-two million, four hundred eighteen thousand, two hundred twenty-one".