21174222 has 8 divisors (see below), whose sum is σ = 42348456. Its totient is φ = 7058072.

The previous prime is 21174221. The next prime is 21174229. The reversal of 21174222 is 22247112.

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

21174222 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21174221) by changing a digit.

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, 1764513 + ... + 1764524.

It is an arithmetic number, because the mean of its divisors is an integer number (5293557).

Almost surely, 2^21174222 is an apocalyptic number.

21174222 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21174222 is a wasteful number, since it uses less digits than its factorization.

21174222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3529042.

The product of its digits is 448, while the sum is 21.

The square root of 21174222 is about 4601.5456099011. The cubic root of 21174222 is about 276.6532781702.

The spelling of 21174222 in words is "twenty-one million, one hundred seventy-four thousand, two hundred twenty-two".