220650811 has 4 divisors (see below), whose sum is σ = 220970824. Its totient is φ = 220330800.

The previous prime is 220650797. The next prime is 220650817. The reversal of 220650811 is 118056022.

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

It is a cyclic number.

It is not a de Polignac number, because 220650811 - 2⁵ = 220650779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220650817) 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 3 ways as a sum of consecutive naturals, for example, 158970 + ... + 160351.

It is an arithmetic number, because the mean of its divisors is an integer number (55242706).

Almost surely, 2^220650811 is an apocalyptic number.

220650811 is a deficient number, since it is larger than the sum of its proper divisors (320013).

220650811 is an equidigital number, since it uses as much as digits as its factorization.

220650811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320012.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 220650811 is about 14854.3196074408. The cubic root of 220650811 is about 604.2757638410.

The spelling of 220650811 in words is "two hundred twenty million, six hundred fifty thousand, eight hundred eleven".