2221829 has 2 divisors, whose sum is σ = 2221830. Its totient is φ = 2221828.

The previous prime is 2221789. The next prime is 2221837. The reversal of 2221829 is 9281222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1768900 + 452929 = 1330^2 + 673^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2221829 is a prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 2221798 and 2221807.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2221859) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110914 + 1110915.

It is an arithmetic number, because the mean of its divisors is an integer number (1110915).

2^2221829 is an apocalyptic number.

It is an amenable number.

2221829 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221829 is an equidigital number, since it uses as much as digits as its factorization.

2221829 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 26.

The square root of 2221829 is about 1490.5800884220. The cubic root of 2221829 is about 130.4878905202.

The spelling of 2221829 in words is "two million, two hundred twenty-one thousand, eight hundred twenty-nine".