2213301781 has 2 divisors, whose sum is σ = 2213301782. Its totient is φ = 2213301780.

The previous prime is 2213301749. The next prime is 2213301793. The reversal of 2213301781 is 1871033122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2180423025 + 32878756 = 46695^2 + 5734^2 .

It is a cyclic number.

It is not a de Polignac number, because 2213301781 - 2⁵ = 2213301749 is a prime.

It is a super-2 number, since 2×2213301781² = 9797409547555543922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2213301731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1106650890 + 1106650891.

It is an arithmetic number, because the mean of its divisors is an integer number (1106650891).

Almost surely, 2^2213301781 is an apocalyptic number.

It is an amenable number.

2213301781 is a deficient number, since it is larger than the sum of its proper divisors (1).

2213301781 is an equidigital number, since it uses as much as digits as its factorization.

2213301781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 2213301781 is about 47045.7413694375. The cubic root of 2213301781 is about 1303.2074214103.

The spelling of 2213301781 in words is "two billion, two hundred thirteen million, three hundred one thousand, seven hundred eighty-one".