21222302 has 4 divisors (see below), whose sum is σ = 31833456. Its totient is φ = 10611150.

The previous prime is 21222293. The next prime is 21222343. The reversal of 21222302 is 20322212.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×21222302² = 900772204358408, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5305574 + ... + 5305577.

It is an arithmetic number, because the mean of its divisors is an integer number (7958364).

Almost surely, 2^21222302 is an apocalyptic number.

21222302 is a deficient number, since it is larger than the sum of its proper divisors (10611154).

21222302 is a wasteful number, since it uses less digits than its factorization.

21222302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10611153.

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

The square root of 21222302 is about 4606.7669791297. The cubic root of 21222302 is about 276.8625174119.

Adding to 21222302 its reverse (20322212), we get a palindrome (41544514).

The spelling of 21222302 in words is "twenty-one million, two hundred twenty-two thousand, three hundred two".