221173049 has 2 divisors, whose sum is σ = 221173050. Its totient is φ = 221173048.

The previous prime is 221173031. The next prime is 221173063. The reversal of 221173049 is 940371122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 217031824 + 4141225 = 14732^2 + 2035^2 .

It is a cyclic number.

It is not a de Polignac number, because 221173049 - 2⁸ = 221172793 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (221173019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110586524 + 110586525.

It is an arithmetic number, because the mean of its divisors is an integer number (110586525).

Almost surely, 2^221173049 is an apocalyptic number.

It is an amenable number.

221173049 is a deficient number, since it is larger than the sum of its proper divisors (1).

221173049 is an equidigital number, since it uses as much as digits as its factorization.

221173049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 221173049 is about 14871.8878761239. The cubic root of 221173049 is about 604.7521230300.

The spelling of 221173049 in words is "two hundred twenty-one million, one hundred seventy-three thousand, forty-nine".