21229322 has 8 divisors (see below), whose sum is σ = 33228576. Its totient is φ = 10153132.

The previous prime is 21229319. The next prime is 21229333. The reversal of 21229322 is 22392212.

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

It is a super-2 number, since 2×21229322² = 901368225159368, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 230708 + ... + 230799.

It is an arithmetic number, because the mean of its divisors is an integer number (4153572).

Almost surely, 2^21229322 is an apocalyptic number.

21229322 is a deficient number, since it is larger than the sum of its proper divisors (11999254).

21229322 is a wasteful number, since it uses less digits than its factorization.

21229322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461532.

The product of its digits is 864, while the sum is 23.

The square root of 21229322 is about 4607.5288387594. The cubic root of 21229322 is about 276.8930412858.

The spelling of 21229322 in words is "twenty-one million, two hundred twenty-nine thousand, three hundred twenty-two".