21192226 has 8 divisors (see below), whose sum is σ = 34678224. Its totient is φ = 9632820.

The previous prime is 21192221. The next prime is 21192229. The reversal of 21192226 is 62229112.

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

It is a super-2 number, since 2×21192226² = 898220885670152, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21192226.

It is not an unprimeable number, because it can be changed into a prime (21192221) 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, 481620 + ... + 481663.

It is an arithmetic number, because the mean of its divisors is an integer number (4334778).

Almost surely, 2^21192226 is an apocalyptic number.

21192226 is a deficient number, since it is larger than the sum of its proper divisors (13485998).

21192226 is a wasteful number, since it uses less digits than its factorization.

21192226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 963296.

The product of its digits is 864, while the sum is 25.

The square root of 21192226 is about 4603.5014934287. The cubic root of 21192226 is about 276.7316667973.

The spelling of 21192226 in words is "twenty-one million, one hundred ninety-two thousand, two hundred twenty-six".