220000520 has 96 divisors (see below), whose sum is σ = 533335320. Its totient is φ = 81607680.

The previous prime is 220000493. The next prime is 220000537. The reversal of 220000520 is 25000022.

It can be written as a sum of positive squares in 4 ways, for example, as 215326276 + 4674244 = 14674^2 + 2162^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 782780 + ... + 783060.

Almost surely, 2^220000520 is an apocalyptic number.

220000520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 220000520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (266667660).

220000520 is an abundant number, since it is smaller than the sum of its proper divisors (313334800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

220000520 is a wasteful number, since it uses less digits than its factorization.

220000520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375 (or 348 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 11.

The square root of 220000520 is about 14832.4145033774. The cubic root of 220000520 is about 603.6815493069.

Adding to 220000520 its reverse (25000022), we get a palindrome (245000542).

The spelling of 220000520 in words is "two hundred twenty million, five hundred twenty", and thus it is an aban number.