2211780643 has 2 divisors, whose sum is σ = 2211780644. Its totient is φ = 2211780642.

The previous prime is 2211780619. The next prime is 2211780667. The reversal of 2211780643 is 3460871122.

It is a balanced prime because it is at equal distance from previous prime (2211780619) and next prime (2211780667).

It is a cyclic number.

It is not a de Polignac number, because 2211780643 - 2⁵ = 2211780611 is a prime.

It is a super-2 number, since 2×2211780643² = 9783947225498986898, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2211780599 and 2211780608.

It is not a weakly prime, because it can be changed into another prime (2212780643) 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, 1105890321 + 1105890322.

It is an arithmetic number, because the mean of its divisors is an integer number (1105890322).

Almost surely, 2^2211780643 is an apocalyptic number.

2211780643 is a deficient number, since it is larger than the sum of its proper divisors (1).

2211780643 is an equidigital number, since it uses as much as digits as its factorization.

2211780643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 2211780643 is about 47029.5720052820. The cubic root of 2211780643 is about 1302.9088007914.

The spelling of 2211780643 in words is "two billion, two hundred eleven million, seven hundred eighty thousand, six hundred forty-three".