13198381 has 16 divisors (see below), whose sum is σ = 15649920. Its totient is φ = 10895040.

The previous prime is 13198379. The next prime is 13198429. The reversal of 13198381 is 18389131.

13198381 = 84² + 85² + ... + 342².

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 13198381 - 2¹ = 13198379 is a prime.

It is a super-2 number, since 2×13198381² = 348394522042322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13198301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33735 + ... + 34123.

It is an arithmetic number, because the mean of its divisors is an integer number (978120).

Almost surely, 2^13198381 is an apocalyptic number.

It is an amenable number.

13198381 is a deficient number, since it is larger than the sum of its proper divisors (2451539).

13198381 is a wasteful number, since it uses less digits than its factorization.

13198381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 564.

The product of its digits is 5184, while the sum is 34.

The square root of 13198381 is about 3632.9576105427. The cubic root of 13198381 is about 236.3234874921.

The spelling of 13198381 in words is "thirteen million, one hundred ninety-eight thousand, three hundred eighty-one".