302222021 has 4 divisors (see below), whose sum is σ = 312643500. Its totient is φ = 291800544.

The previous prime is 302221993. The next prime is 302222023. The reversal of 302222021 is 120222203.

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 105801796 + 196420225 = 10286^2 + 14015^2 .

It is a cyclic number.

It is not a de Polignac number, because 302222021 - 2¹⁴ = 302205637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 302221987 and 302222005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (302222023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5210696 + ... + 5210753.

It is an arithmetic number, because the mean of its divisors is an integer number (78160875).

Almost surely, 2^302222021 is an apocalyptic number.

It is an amenable number.

302222021 is a deficient number, since it is larger than the sum of its proper divisors (10421479).

302222021 is a wasteful number, since it uses less digits than its factorization.

302222021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10421478.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 302222021 is about 17384.5339598161. The cubic root of 302222021 is about 671.0816574360.

Adding to 302222021 its reverse (120222203), we get a palindrome (422444224).

It can be divided in two parts, 30222202 and 1, that added together give a palindrome (30222203).

The spelling of 302222021 in words is "three hundred two million, two hundred twenty-two thousand, twenty-one".