220554252781 has 2 divisors, whose sum is σ = 220554252782. Its totient is φ = 220554252780.

The previous prime is 220554252761. The next prime is 220554252803. The reversal of 220554252781 is 187252455022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 219875650281 + 678602500 = 468909^2 + 26050^2 .

It is a cyclic number.

It is not a de Polignac number, because 220554252781 - 2⁵ = 220554252749 is a prime.

It is a super-2 number, since 2×220554252781² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220554252761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110277126390 + 110277126391.

It is an arithmetic number, because the mean of its divisors is an integer number (110277126391).

Almost surely, 2^220554252781 is an apocalyptic number.

It is an amenable number.

220554252781 is a deficient number, since it is larger than the sum of its proper divisors (1).

220554252781 is an equidigital number, since it uses as much as digits as its factorization.

220554252781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 448000, while the sum is 43.

The spelling of 220554252781 in words is "two hundred twenty billion, five hundred fifty-four million, two hundred fifty-two thousand, seven hundred eighty-one".