221832349 has 2 divisors, whose sum is σ = 221832350. Its totient is φ = 221832348.

The previous prime is 221832319. The next prime is 221832419. The reversal of 221832349 is 943238122.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 177076249 + 44756100 = 13307^2 + 6690^2 .

It is a cyclic number.

It is not a de Polignac number, because 221832349 - 2⁹ = 221831837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221832319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110916174 + 110916175.

It is an arithmetic number, because the mean of its divisors is an integer number (110916175).

Almost surely, 2^221832349 is an apocalyptic number.

It is an amenable number.

221832349 is a deficient number, since it is larger than the sum of its proper divisors (1).

221832349 is an equidigital number, since it uses as much as digits as its factorization.

221832349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 34.

The square root of 221832349 is about 14894.0373639923. The cubic root of 221832349 is about 605.3524335916.

The spelling of 221832349 in words is "two hundred twenty-one million, eight hundred thirty-two thousand, three hundred forty-nine".