220321225 has 12 divisors (see below), whose sum is σ = 273842716. Its totient is φ = 175841280.

The previous prime is 220321201. The next prime is 220321229. The reversal of 220321225 is 522123022.

220321225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 38044224 + 182277001 = 6168^2 + 13501^2 .

It is not a de Polignac number, because 220321225 - 2¹³ = 220313033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220321229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 649 + ... + 21001.

Almost surely, 2^220321225 is an apocalyptic number.

220321225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

220321225 is a deficient number, since it is larger than the sum of its proper divisors (53521491).

220321225 is a wasteful number, since it uses less digits than its factorization.

220321225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20796 (or 20791 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 220321225 is about 14843.2215169080. The cubic root of 220321225 is about 603.9747451175.

Adding to 220321225 its reverse (522123022), we get a palindrome (742444247).

The spelling of 220321225 in words is "two hundred twenty million, three hundred twenty-one thousand, two hundred twenty-five".