2221771 has 2 divisors, whose sum is σ = 2221772. Its totient is φ = 2221770.

The previous prime is 2221757. The next prime is 2221789. The reversal of 2221771 is 1771222.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2221771 - 2⁹ = 2221259 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2221711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110885 + 1110886.

It is an arithmetic number, because the mean of its divisors is an integer number (1110886).

2^2221771 is an apocalyptic number.

2221771 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221771 is an equidigital number, since it uses as much as digits as its factorization.

2221771 is an evil number, because the sum of its binary digits is even.

The product of its digits is 392, while the sum is 22.

The square root of 2221771 is about 1490.5606327822. The cubic root of 2221771 is about 130.4867550647.

Adding to 2221771 its reverse (1771222), we get a palindrome (3992993).

It can be divided in two parts, 2221 and 771, that added together give a palindrome (2992).

The spelling of 2221771 in words is "two million, two hundred twenty-one thousand, seven hundred seventy-one".