221939339 has 2 divisors, whose sum is σ = 221939340. Its totient is φ = 221939338.

The previous prime is 221939329. The next prime is 221939359. The reversal of 221939339 is 933939122.

221939339 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221939339 - 2¹² = 221935243 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 221939296 and 221939305.

It is not a weakly prime, because it can be changed into another prime (221939329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110969669 + 110969670.

It is an arithmetic number, because the mean of its divisors is an integer number (110969670).

Almost surely, 2^221939339 is an apocalyptic number.

221939339 is a deficient number, since it is larger than the sum of its proper divisors (1).

221939339 is an equidigital number, since it uses as much as digits as its factorization.

221939339 is an evil number, because the sum of its binary digits is even.

The product of its digits is 78732, while the sum is 41.

The square root of 221939339 is about 14897.6286367999. The cubic root of 221939339 is about 605.4497386775.

The spelling of 221939339 in words is "two hundred twenty-one million, nine hundred thirty-nine thousand, three hundred thirty-nine".