164221355 has 16 divisors (see below), whose sum is σ = 205428000. Its totient is φ = 125908992.

The previous prime is 164221349. The next prime is 164221381. The reversal of 164221355 is 553122461.

It is a cyclic number.

It is not a de Polignac number, because 164221355 - 2⁴ = 164221339 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5771 + ... + 19019.

It is an arithmetic number, because the mean of its divisors is an integer number (12839250).

Almost surely, 2^164221355 is an apocalyptic number.

164221355 is a deficient number, since it is larger than the sum of its proper divisors (41206645).

164221355 is a wasteful number, since it uses less digits than its factorization.

164221355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13358.

The product of its digits is 7200, while the sum is 29.

The square root of 164221355 is about 12814.8880213602. Note that the first 3 decimals coincide. The cubic root of 164221355 is about 547.6165233664.

The spelling of 164221355 in words is "one hundred sixty-four million, two hundred twenty-one thousand, three hundred fifty-five".