21302222 has 8 divisors (see below), whose sum is σ = 32011200. Its totient is φ = 10631824.

The previous prime is 21302221. The next prime is 21302227. The reversal of 21302222 is 22220312.

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

21302222 is a modest number, since divided by 2222 gives 2130 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 21302197 and 21302206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21302221) 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, 8222 + ... + 10497.

It is an arithmetic number, because the mean of its divisors is an integer number (4001400).

Almost surely, 2^21302222 is an apocalyptic number.

21302222 is a deficient number, since it is larger than the sum of its proper divisors (10708978).

21302222 is a wasteful number, since it uses less digits than its factorization.

21302222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19290.

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

The square root of 21302222 is about 4615.4330241051. The cubic root of 21302222 is about 277.2096229378.

Adding to 21302222 its reverse (22220312), we get a palindrome (43522534).

The spelling of 21302222 in words is "twenty-one million, three hundred two thousand, two hundred twenty-two".