338771221 has 2 divisors, whose sum is σ = 338771222. Its totient is φ = 338771220.

The previous prime is 338771179. The next prime is 338771249. The reversal of 338771221 is 122177833.

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., 338192100 + 579121 = 18390^2 + 761^2 .

It is a cyclic number.

It is not a de Polignac number, because 338771221 - 2¹⁷ = 338640149 is a prime.

It is a super-2 number, since 2×338771221² = 229531880355661682, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (338771621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 169385610 + 169385611.

It is an arithmetic number, because the mean of its divisors is an integer number (169385611).

Almost surely, 2^338771221 is an apocalyptic number.

It is an amenable number.

338771221 is a deficient number, since it is larger than the sum of its proper divisors (1).

338771221 is an equidigital number, since it uses as much as digits as its factorization.

338771221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14112, while the sum is 34.

The square root of 338771221 is about 18405.7388061441. The cubic root of 338771221 is about 697.1113757743. Note that the first 3 decimals are identical.

The spelling of 338771221 in words is "three hundred thirty-eight million, seven hundred seventy-one thousand, two hundred twenty-one".