220465505 has 16 divisors (see below), whose sum is σ = 285347664. Its totient is φ = 162554880.

The previous prime is 220465501. The next prime is 220465517. The reversal of 220465505 is 505564022.

It can be written as a sum of positive squares in 8 ways, for example, as 56190016 + 164275489 = 7496^2 + 12817^2 .

It is not a de Polignac number, because 220465505 - 2² = 220465501 is a prime.

It is a super-3 number, since 3×220465505³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220465501) 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, 47237 + ... + 51693.

It is an arithmetic number, because the mean of its divisors is an integer number (17834229).

Almost surely, 2^220465505 is an apocalyptic number.

It is an amenable number.

220465505 is a deficient number, since it is larger than the sum of its proper divisors (64882159).

220465505 is a wasteful number, since it uses less digits than its factorization.

220465505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5236.

The product of its (nonzero) digits is 12000, while the sum is 29.

The square root of 220465505 is about 14848.0808524200. The cubic root of 220465505 is about 604.1065563872.

The spelling of 220465505 in words is "two hundred twenty million, four hundred sixty-five thousand, five hundred five".