220488481 has 2 divisors, whose sum is σ = 220488482. Its totient is φ = 220488480.

The previous prime is 220488473. The next prime is 220488493. The reversal of 220488481 is 184884022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 185204881 + 35283600 = 13609^2 + 5940^2 .

It is a cyclic number.

It is not a de Polignac number, because 220488481 - 2³ = 220488473 is a prime.

It is a super-2 number, since 2×220488481² = 97230340507374722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 220488481.

It is not a weakly prime, because it can be changed into another prime (220482481) 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 as a sum of consecutive naturals, namely, 110244240 + 110244241.

It is an arithmetic number, because the mean of its divisors is an integer number (110244241).

Almost surely, 2^220488481 is an apocalyptic number.

It is an amenable number.

220488481 is a deficient number, since it is larger than the sum of its proper divisors (1).

220488481 is an equidigital number, since it uses as much as digits as its factorization.

220488481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32768, while the sum is 37.

The square root of 220488481 is about 14848.8545349465. The cubic root of 220488481 is about 604.1275414843.

The spelling of 220488481 in words is "two hundred twenty million, four hundred eighty-eight thousand, four hundred eighty-one".