338881521 has 8 divisors (see below), whose sum is σ = 492918624. Its totient is φ = 205382720.

The previous prime is 338881507. The next prime is 338881531. The reversal of 338881521 is 125188833.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 338881521 - 2⁷ = 338881393 is a prime.

It is a super-2 number, since 2×338881521² = 229681370550546882, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 338881521.

It is not an unprimeable number, because it can be changed into a prime (338881531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5134536 + ... + 5134601.

It is an arithmetic number, because the mean of its divisors is an integer number (61614828).

Almost surely, 2^338881521 is an apocalyptic number.

It is an amenable number.

338881521 is a deficient number, since it is larger than the sum of its proper divisors (154037103).

338881521 is a wasteful number, since it uses less digits than its factorization.

338881521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10269151.

The product of its digits is 46080, while the sum is 39.

The square root of 338881521 is about 18408.7349103625. The cubic root of 338881521 is about 697.1870247045.

The spelling of 338881521 in words is "three hundred thirty-eight million, eight hundred eighty-one thousand, five hundred twenty-one".