221373343 has 2 divisors, whose sum is σ = 221373344. Its totient is φ = 221373342.

The previous prime is 221373311. The next prime is 221373353. The reversal of 221373343 is 343373122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221373343 - 2⁵ = 221373311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221373353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110686671 + 110686672.

It is an arithmetic number, because the mean of its divisors is an integer number (110686672).

Almost surely, 2^221373343 is an apocalyptic number.

221373343 is a deficient number, since it is larger than the sum of its proper divisors (1).

221373343 is an equidigital number, since it uses as much as digits as its factorization.

221373343 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 28.

The square root of 221373343 is about 14878.6203325443. The cubic root of 221373343 is about 604.9346221729.

The spelling of 221373343 in words is "two hundred twenty-one million, three hundred seventy-three thousand, three hundred forty-three".