338145681 has 4 divisors (see below), whose sum is σ = 450860912. Its totient is φ = 225430452.

The previous prime is 338145659. The next prime is 338145707. The reversal of 338145681 is 186541833.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 338145681 - 2⁹ = 338145169 is a prime.

It is a super-2 number, since 2×338145681² = 228685003157907522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (338145611) 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 in 3 ways as a sum of consecutive naturals, for example, 56357611 + ... + 56357616.

It is an arithmetic number, because the mean of its divisors is an integer number (112715228).

Almost surely, 2^338145681 is an apocalyptic number.

It is an amenable number.

338145681 is a deficient number, since it is larger than the sum of its proper divisors (112715231).

338145681 is a wasteful number, since it uses less digits than its factorization.

338145681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112715230.

The product of its digits is 69120, while the sum is 39.

The square root of 338145681 is about 18388.7378849121. The cubic root of 338145681 is about 696.6820400851.

The spelling of 338145681 in words is "three hundred thirty-eight million, one hundred forty-five thousand, six hundred eighty-one".