7223442021 has 12 divisors (see below), whose sum is σ = 10983011520. Its totient is φ = 4562173800.

The previous prime is 7223442019. The next prime is 7223442071. The reversal of 7223442021 is 1202443227.

7223442021 is a `hidden beast` number, since 7 + 2 + 234 + 420 + 2 + 1 = 666.

It is not a de Polignac number, because 7223442021 - 2¹ = 7223442019 is a prime.

It is a super-2 number, since 2×7223442021² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7223442011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21121005 + ... + 21121346.

It is an arithmetic number, because the mean of its divisors is an integer number (915250960).

Almost surely, 2^7223442021 is an apocalyptic number.

It is an amenable number.

7223442021 is a deficient number, since it is larger than the sum of its proper divisors (3759569499).

7223442021 is a wasteful number, since it uses less digits than its factorization.

7223442021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42242376 (or 42242373 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 27.

The square root of 7223442021 is about 84990.8349235375. The cubic root of 7223442021 is about 1933.0721491765.

Adding to 7223442021 its reverse (1202443227), we get a palindrome (8425885248).

The spelling of 7223442021 in words is "seven billion, two hundred twenty-three million, four hundred forty-two thousand, twenty-one".