221377339 has 2 divisors, whose sum is σ = 221377340. Its totient is φ = 221377338.

The previous prime is 221377337. The next prime is 221377363. The reversal of 221377339 is 933773122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221377339 - 2¹ = 221377337 is a prime.

Together with 221377337, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 221377298 and 221377307.

It is not a weakly prime, because it can be changed into another prime (221377337) 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, 110688669 + 110688670.

It is an arithmetic number, because the mean of its divisors is an integer number (110688670).

Almost surely, 2^221377339 is an apocalyptic number.

221377339 is a deficient number, since it is larger than the sum of its proper divisors (1).

221377339 is an equidigital number, since it uses as much as digits as its factorization.

221377339 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47628, while the sum is 37.

The square root of 221377339 is about 14878.7546185828. The cubic root of 221377339 is about 604.9382620333.

The spelling of 221377339 in words is "two hundred twenty-one million, three hundred seventy-seven thousand, three hundred thirty-nine".