221332193 has 2 divisors, whose sum is σ = 221332194. Its totient is φ = 221332192.

The previous prime is 221332127. The next prime is 221332213. The reversal of 221332193 is 391233122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 156175009 + 65157184 = 12497^2 + 8072^2 .

It is a cyclic number.

It is not a de Polignac number, because 221332193 - 2⁸ = 221331937 is a prime.

It is not a weakly prime, because it can be changed into another prime (221332123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110666096 + 110666097.

It is an arithmetic number, because the mean of its divisors is an integer number (110666097).

Almost surely, 2^221332193 is an apocalyptic number.

It is an amenable number.

221332193 is a deficient number, since it is larger than the sum of its proper divisors (1).

221332193 is an equidigital number, since it uses as much as digits as its factorization.

221332193 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1944, while the sum is 26.

The square root of 221332193 is about 14877.2374115627. The cubic root of 221332193 is about 604.8971370780.

The spelling of 221332193 in words is "two hundred twenty-one million, three hundred thirty-two thousand, one hundred ninety-three".