220525321 has 2 divisors, whose sum is σ = 220525322. Its totient is φ = 220525320.

The previous prime is 220525297. The next prime is 220525379. The reversal of 220525321 is 123525022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 142468096 + 78057225 = 11936^2 + 8835^2 .

It is a cyclic number.

It is not a de Polignac number, because 220525321 - 2⁹ = 220524809 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 220525292 and 220525301.

It is not a weakly prime, because it can be changed into another prime (220525391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110262660 + 110262661.

It is an arithmetic number, because the mean of its divisors is an integer number (110262661).

Almost surely, 2^220525321 is an apocalyptic number.

It is an amenable number.

220525321 is a deficient number, since it is larger than the sum of its proper divisors (1).

220525321 is an equidigital number, since it uses as much as digits as its factorization.

220525321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 220525321 is about 14850.0949828612. The cubic root of 220525321 is about 604.1611862037.

The spelling of 220525321 in words is "two hundred twenty million, five hundred twenty-five thousand, three hundred twenty-one".