22001155 has 16 divisors (see below), whose sum is σ = 28917504. Its totient is φ = 15936480.

The previous prime is 22001143. The next prime is 22001173. The reversal of 22001155 is 55110022.

It is a de Polignac number, because none of the positive numbers 2^k-22001155 is a prime.

It is a zygodrome in base 10.

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 15 ways as a sum of consecutive naturals, for example, 16234 + ... + 17536.

It is an arithmetic number, because the mean of its divisors is an integer number (1807344).

Almost surely, 2^22001155 is an apocalyptic number.

22001155 is a deficient number, since it is larger than the sum of its proper divisors (6916349).

22001155 is a wasteful number, since it uses less digits than its factorization.

22001155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1626.

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 22001155 is about 4690.5388816212. The cubic root of 22001155 is about 280.2088365486.

Adding to 22001155 its reverse (55110022), we get a palindrome (77111177).

The spelling of 22001155 in words is "twenty-two million, one thousand, one hundred fifty-five".