221340079 has 2 divisors, whose sum is σ = 221340080. Its totient is φ = 221340078.

The previous prime is 221340059. The next prime is 221340127. The reversal of 221340079 is 970043122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221340079 - 2¹¹ = 221338031 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221340019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110670039 + 110670040.

It is an arithmetic number, because the mean of its divisors is an integer number (110670040).

Almost surely, 2^221340079 is an apocalyptic number.

221340079 is a deficient number, since it is larger than the sum of its proper divisors (1).

221340079 is an equidigital number, since it uses as much as digits as its factorization.

221340079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 221340079 is about 14877.5024449670. The cubic root of 221340079 is about 604.9043210942.

The spelling of 221340079 in words is "two hundred twenty-one million, three hundred forty thousand, seventy-nine".