338274221 has 2 divisors, whose sum is σ = 338274222. Its totient is φ = 338274220.

The previous prime is 338274169. The next prime is 338274247. The reversal of 338274221 is 122472833.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 308178025 + 30096196 = 17555^2 + 5486^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-338274221 is a prime.

It is a super-2 number, since 2×338274221² = 228858897186313682, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (338264221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 169137110 + 169137111.

It is an arithmetic number, because the mean of its divisors is an integer number (169137111).

Almost surely, 2^338274221 is an apocalyptic number.

It is an amenable number.

338274221 is a deficient number, since it is larger than the sum of its proper divisors (1).

338274221 is an equidigital number, since it uses as much as digits as its factorization.

338274221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 32.

The square root of 338274221 is about 18392.2326268455. The cubic root of 338274221 is about 696.7703059517.

The spelling of 338274221 in words is "three hundred thirty-eight million, two hundred seventy-four thousand, two hundred twenty-one".