220204045 has 4 divisors (see below), whose sum is σ = 264244860. Its totient is φ = 176163232.

The previous prime is 220204021. The next prime is 220204051. The reversal of 220204045 is 540402022.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 540402022 = 2 ⋅270201011.

It can be written as a sum of positive squares in 2 ways, for example, as 106440489 + 113763556 = 10317^2 + 10666^2 .

It is a cyclic number.

It is not a de Polignac number, because 220204045 - 2⁵ = 220204013 is a prime.

It is a congruent number.

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, 22020400 + ... + 22020409.

It is an arithmetic number, because the mean of its divisors is an integer number (66061215).

Almost surely, 2^220204045 is an apocalyptic number.

It is an amenable number.

220204045 is a deficient number, since it is larger than the sum of its proper divisors (44040815).

220204045 is an equidigital number, since it uses as much as digits as its factorization.

220204045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44040814.

The product of its (nonzero) digits is 640, while the sum is 19.

The square root of 220204045 is about 14839.2737355977. The cubic root of 220204045 is about 603.8676495020.

Adding to 220204045 its reverse (540402022), we get a palindrome (760606067).

The spelling of 220204045 in words is "two hundred twenty million, two hundred four thousand, forty-five".