21193222 has 4 divisors (see below), whose sum is σ = 31789836. Its totient is φ = 10596610.

The previous prime is 21193217. The next prime is 21193223. The reversal of 21193222 is 22239112.

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

It is a junction number, because it is equal to n+sod(n) for n = 21193193 and 21193202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21193223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5298304 + ... + 5298307.

It is an arithmetic number, because the mean of its divisors is an integer number (7947459).

Almost surely, 2^21193222 is an apocalyptic number.

21193222 is a deficient number, since it is larger than the sum of its proper divisors (10596614).

21193222 is a wasteful number, since it uses less digits than its factorization.

21193222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10596613.

The product of its digits is 432, while the sum is 22.

The square root of 21193222 is about 4603.6096706823. The cubic root of 21193222 is about 276.7360020415.

The spelling of 21193222 in words is "twenty-one million, one hundred ninety-three thousand, two hundred twenty-two".