221465339 has 2 divisors, whose sum is σ = 221465340. Its totient is φ = 221465338.

The previous prime is 221465297. The next prime is 221465357. The reversal of 221465339 is 933564122.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221465339 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221465299 and 221465308.

It is not a weakly prime, because it can be changed into another prime (221465359) 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, 110732669 + 110732670.

It is an arithmetic number, because the mean of its divisors is an integer number (110732670).

Almost surely, 2^221465339 is an apocalyptic number.

221465339 is a deficient number, since it is larger than the sum of its proper divisors (1).

221465339 is an equidigital number, since it uses as much as digits as its factorization.

221465339 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38880, while the sum is 35.

The square root of 221465339 is about 14881.7115615107. The cubic root of 221465339 is about 605.0184080186.

The spelling of 221465339 in words is "two hundred twenty-one million, four hundred sixty-five thousand, three hundred thirty-nine".