2214557221 has 2 divisors, whose sum is σ = 2214557222. Its totient is φ = 2214557220.

The previous prime is 2214557203. The next prime is 2214557287. The reversal of 2214557221 is 1227554122.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2027250625 + 187306596 = 45025^2 + 13686^2 .

It is a cyclic number.

It is not a de Polignac number, because 2214557221 - 2⁹ = 2214556709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2214557021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1107278610 + 1107278611.

It is an arithmetic number, because the mean of its divisors is an integer number (1107278611).

Almost surely, 2^2214557221 is an apocalyptic number.

It is an amenable number.

2214557221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2214557221 is an equidigital number, since it uses as much as digits as its factorization.

2214557221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11200, while the sum is 31.

The square root of 2214557221 is about 47059.0822371198. The cubic root of 2214557221 is about 1303.4537787592.

The spelling of 2214557221 in words is "two billion, two hundred fourteen million, five hundred fifty-seven thousand, two hundred twenty-one".