22205155 has 32 divisors (see below), whose sum is σ = 31933440. Its totient is φ = 14501760.

The previous prime is 22205137. The next prime is 22205177. The reversal of 22205155 is 55150222.

22205155 = 861² + 862² + ... + 889².

22205155 is nontrivially palindromic in base 12.

It is not a de Polignac number, because 22205155 - 2¹³ = 22196963 is a prime.

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 31 ways as a sum of consecutive naturals, for example, 132882 + ... + 133048.

It is an arithmetic number, because the mean of its divisors is an integer number (997920).

Almost surely, 2^22205155 is an apocalyptic number.

22205155 is a deficient number, since it is larger than the sum of its proper divisors (9728285).

22205155 is a wasteful number, since it uses less digits than its factorization.

22205155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339.

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 22205155 is about 4712.2346079116. The cubic root of 22205155 is about 281.0722280695.

Adding to 22205155 its reverse (55150222), we get a palindrome (77355377).

The spelling of 22205155 in words is "twenty-two million, two hundred five thousand, one hundred fifty-five".