220503779528 has 12 divisors (see below), whose sum is σ = 413447076945. Its totient is φ = 110251225680.

The previous prime is 220503779521. The next prime is 220503779579. The reversal of 220503779528 is 825977305022.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 175592845444 + 44910934084 = 419038^2 + 211922^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=332042.

It is a super-2 number, since 2×220503779528² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220503779521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1245158 + ... + 1411178.

Almost surely, 2^220503779528 is an apocalyptic number.

It is an amenable number.

220503779528 is a deficient number, since it is larger than the sum of its proper divisors (192943297417).

220503779528 is an frugal number, since it uses more digits than its factorization.

220503779528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332048 (or 166023 counting only the distinct ones).

The product of its (nonzero) digits is 2116800, while the sum is 50.

Multiplying 220503779528 by its sum of digits (50), we get a square (11025188976400 = 3320420²).

The spelling of 220503779528 in words is "two hundred twenty billion, five hundred three million, seven hundred seventy-nine thousand, five hundred twenty-eight".