4242282221 has 4 divisors (see below), whose sum is σ = 4491828252. Its totient is φ = 3992736192.

The previous prime is 4242282193. The next prime is 4242282223. The reversal of 4242282221 is 1222822424.

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 3386076100 + 856206121 = 58190^2 + 29261^2 .

It is a cyclic number.

It is not a de Polignac number, because 4242282221 - 2⁶ = 4242282157 is a prime.

It is a super-2 number, since 2×4242282221² = 35993916885225385682, which 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 (4242282223) 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, 124772990 + ... + 124773023.

It is an arithmetic number, because the mean of its divisors is an integer number (1122957063).

Almost surely, 2^4242282221 is an apocalyptic number.

It is an amenable number.

4242282221 is a deficient number, since it is larger than the sum of its proper divisors (249546031).

4242282221 is a wasteful number, since it uses less digits than its factorization.

4242282221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249546030.

The product of its digits is 8192, while the sum is 29.

The square root of 4242282221 is about 65132.8044920530. The cubic root of 4242282221 is about 1618.8248121017.

The spelling of 4242282221 in words is "four billion, two hundred forty-two million, two hundred eighty-two thousand, two hundred twenty-one".