220521224 has 32 divisors (see below), whose sum is σ = 515505600. Its totient is φ = 85917120.

The previous prime is 220521211. The next prime is 220521269. The reversal of 220521224 is 422125022.

It is a super-2 number, since 2×220521224² = 97259220468916352, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 220521196 and 220521205.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 178379 + ... + 179610.

It is an arithmetic number, because the mean of its divisors is an integer number (16109550).

Almost surely, 2^220521224 is an apocalyptic number.

It is an amenable number.

220521224 is an abundant number, since it is smaller than the sum of its proper divisors (294984376).

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

220521224 is a wasteful number, since it uses less digits than its factorization.

220521224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358013 (or 358009 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 220521224 is about 14849.9570369749. The cubic root of 220521224 is about 604.1574447381.

Adding to 220521224 its reverse (422125022), we get a palindrome (642646246).

The spelling of 220521224 in words is "two hundred twenty million, five hundred twenty-one thousand, two hundred twenty-four".