220113281 has 2 divisors, whose sum is σ = 220113282. Its totient is φ = 220113280.

The previous prime is 220113269. The next prime is 220113307. The reversal of 220113281 is 182311022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119793025 + 100320256 = 10945^2 + 10016^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220113281 is a prime.

It is a super-2 number, since 2×220113281² = 96899712945169922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (220113221) 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, 110056640 + 110056641.

It is an arithmetic number, because the mean of its divisors is an integer number (110056641).

Almost surely, 2^220113281 is an apocalyptic number.

It is an amenable number.

220113281 is a deficient number, since it is larger than the sum of its proper divisors (1).

220113281 is an equidigital number, since it uses as much as digits as its factorization.

220113281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 220113281 is about 14836.2151844734. The cubic root of 220113281 is about 603.7846704396.

The spelling of 220113281 in words is "two hundred twenty million, one hundred thirteen thousand, two hundred eighty-one".