221682341 has 2 divisors, whose sum is σ = 221682342. Its totient is φ = 221682340.

The previous prime is 221682319. The next prime is 221682353. The reversal of 221682341 is 143286122.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 209641441 + 12040900 = 14479^2 + 3470^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221682341 is a prime.

It is a super-2 number, since 2×221682341² = 98286120622480562, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221682301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110841170 + 110841171.

It is an arithmetic number, because the mean of its divisors is an integer number (110841171).

Almost surely, 2^221682341 is an apocalyptic number.

It is an amenable number.

221682341 is a deficient number, since it is larger than the sum of its proper divisors (1).

221682341 is an equidigital number, since it uses as much as digits as its factorization.

221682341 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4608, while the sum is 29.

The square root of 221682341 is about 14889.0006716368. Note that the first 3 decimals coincide. The cubic root of 221682341 is about 605.2159518676.

The spelling of 221682341 in words is "two hundred twenty-one million, six hundred eighty-two thousand, three hundred forty-one".