220545011 has 4 divisors (see below), whose sum is σ = 223336800. Its totient is φ = 217753224.

The previous prime is 220544983. The next prime is 220545019. The reversal of 220545011 is 110545022.

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 220545011 - 2²⁶ = 153436147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220545019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1395776 + ... + 1395933.

It is an arithmetic number, because the mean of its divisors is an integer number (55834200).

Almost surely, 2^220545011 is an apocalyptic number.

220545011 is a deficient number, since it is larger than the sum of its proper divisors (2791789).

220545011 is an equidigital number, since it uses as much as digits as its factorization.

220545011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2791788.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 220545011 is about 14850.7579267861. The cubic root of 220545011 is about 604.1791668747.

The spelling of 220545011 in words is "two hundred twenty million, five hundred forty-five thousand, eleven".