22154222 has 8 divisors (see below), whose sum is σ = 33252336. Its totient is φ = 11070112.

The previous prime is 22154203. The next prime is 22154233. The reversal of 22154222 is 22245122.

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

It is a junction number, because it is equal to n+sod(n) for n = 22154194 and 22154203.

It is a congruent number.

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, 2543 + ... + 7125.

It is an arithmetic number, because the mean of its divisors is an integer number (4156542).

Almost surely, 2^22154222 is an apocalyptic number.

22154222 is a deficient number, since it is larger than the sum of its proper divisors (11098114).

22154222 is a wasteful number, since it uses less digits than its factorization.

22154222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7002.

The product of its digits is 640, while the sum is 20.

The square root of 22154222 is about 4706.8271691236. The cubic root of 22154222 is about 280.8571607213.

Adding to 22154222 its reverse (22245122), we get a palindrome (44399344).

The spelling of 22154222 in words is "twenty-two million, one hundred fifty-four thousand, two hundred twenty-two".