22513222 has 8 divisors (see below), whose sum is σ = 34934400. Its totient is φ = 10868424.

The previous prime is 22513217. The next prime is 22513243. The reversal of 22513222 is 22231522.

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

It is a self number, because there is not a number n which added to its sum of digits gives 22513222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 194022 + ... + 194137.

It is an arithmetic number, because the mean of its divisors is an integer number (4366800).

Almost surely, 2^22513222 is an apocalyptic number.

22513222 is a deficient number, since it is larger than the sum of its proper divisors (12421178).

22513222 is a wasteful number, since it uses less digits than its factorization.

22513222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388190.

The product of its digits is 480, while the sum is 19.

The square root of 22513222 is about 4744.8100067337. The cubic root of 22513222 is about 282.3660972951.

Adding to 22513222 its reverse (22231522), we get a palindrome (44744744).

The spelling of 22513222 in words is "twenty-two million, five hundred thirteen thousand, two hundred twenty-two".