338131783081 has 3 divisors (see below), whose sum is σ = 338132364573. Its totient is φ = 338131201590.

The previous prime is 338131783061. The next prime is 338131783091. The reversal of 338131783081 is 180387131833.

It is a happy number.

The square root of 338131783081 is 581491.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 338131783081 - 2⁵ = 338131783049 is a prime.

It is a super-2 number, since 2×338131783081² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (338131783051) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 290746 + ... + 872236.

It is an arithmetic number, because the mean of its divisors is an integer number (112710788191).

Almost surely, 2^338131783081 is an apocalyptic number.

338131783081 is the 581491-st square number.

338131783081 is the 290746-th centered octagonal number.

It is an amenable number.

338131783081 is a deficient number, since it is larger than the sum of its proper divisors (581492).

338131783081 is an frugal number, since it uses more digits than its factorization.

338131783081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1162982 (or 581491 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 46.

The spelling of 338131783081 in words is "three hundred thirty-eight billion, one hundred thirty-one million, seven hundred eighty-three thousand, eighty-one".