220331893681 has 2 divisors, whose sum is σ = 220331893682. Its totient is φ = 220331893680.

The previous prime is 220331893669. The next prime is 220331893729. The reversal of 220331893681 is 186398133022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 193966253056 + 26365640625 = 440416^2 + 162375^2 .

It is a cyclic number.

It is not a de Polignac number, because 220331893681 - 2¹⁹ = 220331369393 is a prime.

It is a super-3 number, since 3×220331893681³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (220331893631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110165946840 + 110165946841.

It is an arithmetic number, because the mean of its divisors is an integer number (110165946841).

Almost surely, 2^220331893681 is an apocalyptic number.

It is an amenable number.

220331893681 is a deficient number, since it is larger than the sum of its proper divisors (1).

220331893681 is an equidigital number, since it uses as much as digits as its factorization.

220331893681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 373248, while the sum is 46.

The spelling of 220331893681 in words is "two hundred twenty billion, three hundred thirty-one million, eight hundred ninety-three thousand, six hundred eighty-one".