338361521 has 2 divisors, whose sum is σ = 338361522. Its totient is φ = 338361520.

The previous prime is 338361427. The next prime is 338361547. The reversal of 338361521 is 125163833.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 200533921 + 137827600 = 14161^2 + 11740^2 .

It is a cyclic number.

It is not a de Polignac number, because 338361521 - 2¹⁰ = 338360497 is a prime.

It is a super-2 number, since 2×338361521² = 228977037786866882, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (338361721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 169180760 + 169180761.

It is an arithmetic number, because the mean of its divisors is an integer number (169180761).

Almost surely, 2^338361521 is an apocalyptic number.

It is an amenable number.

338361521 is a deficient number, since it is larger than the sum of its proper divisors (1).

338361521 is an equidigital number, since it uses as much as digits as its factorization.

338361521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 32.

The square root of 338361521 is about 18394.6057582107. The cubic root of 338361521 is about 696.8302403796.

The spelling of 338361521 in words is "three hundred thirty-eight million, three hundred sixty-one thousand, five hundred twenty-one".