220310505 has 12 divisors (see below), whose sum is σ = 381871620. Its totient is φ = 117498912.

The previous prime is 220310471. The next prime is 220310513. The reversal of 220310505 is 505013022.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 65755881 + 154554624 = 8109^2 + 12432^2 .

It is not a de Polignac number, because 220310505 - 2⁹ = 220309993 is a prime.

It is a super-2 number, since 2×220310505² = 97073437226710050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2447850 + ... + 2447939.

It is an arithmetic number, because the mean of its divisors is an integer number (31822635).

Almost surely, 2^220310505 is an apocalyptic number.

It is an amenable number.

220310505 is a deficient number, since it is larger than the sum of its proper divisors (161561115).

220310505 is a wasteful number, since it uses less digits than its factorization.

220310505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4895800 (or 4895797 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 220310505 is about 14842.8604049220. The cubic root of 220310505 is about 603.9649492474.

Adding to 220310505 its reverse (505013022), we get a palindrome (725323527).

The spelling of 220310505 in words is "two hundred twenty million, three hundred ten thousand, five hundred five".