220164545 has 4 divisors (see below), whose sum is σ = 264197460. Its totient is φ = 176131632.

The previous prime is 220164523. The next prime is 220164641. The reversal of 220164545 is 545461022.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 100240144 + 119924401 = 10012^2 + 10951^2 .

It is a cyclic number.

It is not a de Polignac number, because 220164545 - 2⁶ = 220164481 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22016450 + ... + 22016459.

It is an arithmetic number, because the mean of its divisors is an integer number (66049365).

Almost surely, 2^220164545 is an apocalyptic number.

It is an amenable number.

220164545 is a deficient number, since it is larger than the sum of its proper divisors (44032915).

220164545 is an equidigital number, since it uses as much as digits as its factorization.

220164545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44032914.

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 220164545 is about 14837.9427482384. The cubic root of 220164545 is about 603.8315402674.

The spelling of 220164545 in words is "two hundred twenty million, one hundred sixty-four thousand, five hundred forty-five".