220321025 has 24 divisors (see below), whose sum is σ = 287820864. Its totient is φ = 166971200.

The previous prime is 220321021. The next prime is 220321027. The reversal of 220321025 is 520123022.

It is not a de Polignac number, because 220321025 - 2² = 220321021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 220320994 and 220321012.

It is not an unprimeable number, because it can be changed into a prime (220321021) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 59735 + ... + 63315.

It is an arithmetic number, because the mean of its divisors is an integer number (11992536).

Almost surely, 2^220321025 is an apocalyptic number.

220321025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

220321025 is a deficient number, since it is larger than the sum of its proper divisors (67499839).

220321025 is a wasteful number, since it uses less digits than its factorization.

220321025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3721 (or 3716 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 220321025 is about 14843.2147798245. The cubic root of 220321025 is about 603.9745623616.

Adding to 220321025 its reverse (520123022), we get a palindrome (740444047).

The spelling of 220321025 in words is "two hundred twenty million, three hundred twenty-one thousand, twenty-five".