22122155 has 8 divisors (see below), whose sum is σ = 28959984. Its totient is φ = 16088800.

The previous prime is 22122103. The next prime is 22122169. The reversal of 22122155 is 55122122.

It is a happy number.

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

It is not a de Polignac number, because 22122155 - 2¹⁴ = 22105771 is a prime.

It is a Duffinian 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 7 ways as a sum of consecutive naturals, for example, 201056 + ... + 201165.

It is an arithmetic number, because the mean of its divisors is an integer number (3619998).

Almost surely, 2^22122155 is an apocalyptic number.

22122155 is a deficient number, since it is larger than the sum of its proper divisors (6837829).

22122155 is a wasteful number, since it uses less digits than its factorization.

22122155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402237.

The product of its digits is 400, while the sum is 20.

The square root of 22122155 is about 4703.4195007462. The cubic root of 22122155 is about 280.7215869329.

Adding to 22122155 its reverse (55122122), we get a palindrome (77244277).

The spelling of 22122155 in words is "twenty-two million, one hundred twenty-two thousand, one hundred fifty-five".