221373079 has 2 divisors, whose sum is σ = 221373080. Its totient is φ = 221373078.

The previous prime is 221373043. The next prime is 221373083. The reversal of 221373079 is 970373122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221373079 - 2⁷ = 221372951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221373179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110686539 + 110686540.

It is an arithmetic number, because the mean of its divisors is an integer number (110686540).

Almost surely, 2^221373079 is an apocalyptic number.

221373079 is a deficient number, since it is larger than the sum of its proper divisors (1).

221373079 is an equidigital number, since it uses as much as digits as its factorization.

221373079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15876, while the sum is 34.

The square root of 221373079 is about 14878.6114607513. The cubic root of 221373079 is about 604.9343817001.

The spelling of 221373079 in words is "two hundred twenty-one million, three hundred seventy-three thousand, seventy-nine".