164220155 has 16 divisors (see below), whose sum is σ = 215253504. Its totient is φ = 119280480.

The previous prime is 164220137. The next prime is 164220157. The reversal of 164220155 is 551022461.

It is not a de Polignac number, because 164220155 - 2¹⁰ = 164219131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164220157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59312 + ... + 62018.

It is an arithmetic number, because the mean of its divisors is an integer number (13453344).

Almost surely, 2^164220155 is an apocalyptic number.

164220155 is a deficient number, since it is larger than the sum of its proper divisors (51033349).

164220155 is a wasteful number, since it uses less digits than its factorization.

164220155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3826.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 164220155 is about 12814.8412007328. The cubic root of 164220155 is about 547.6151895134.

The spelling of 164220155 in words is "one hundred sixty-four million, two hundred twenty thousand, one hundred fifty-five".