220512305 has 16 divisors (see below), whose sum is σ = 288583680. Its totient is φ = 160774848.

The previous prime is 220512301. The next prime is 220512307. The reversal of 220512305 is 503215022.

It is not a de Polignac number, because 220512305 - 2² = 220512301 is a prime.

It is not an unprimeable number, because it can be changed into a prime (220512301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16337 + ... + 26606.

It is an arithmetic number, because the mean of its divisors is an integer number (18036480).

Almost surely, 2^220512305 is an apocalyptic number.

It is an amenable number.

220512305 is a deficient number, since it is larger than the sum of its proper divisors (68071375).

220512305 is a wasteful number, since it uses less digits than its factorization.

220512305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43040.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 220512305 is about 14849.6567300393. The cubic root of 220512305 is about 604.1492995616.

Adding to 220512305 its reverse (503215022), we get a palindrome (723727327).

The spelling of 220512305 in words is "two hundred twenty million, five hundred twelve thousand, three hundred five".