13131819 has 6 divisors (see below), whose sum is σ = 18968196. Its totient is φ = 8754540.

The previous prime is 13131791. The next prime is 13131851. The reversal of 13131819 is 91813131.

It is a happy number.

It is not a de Polignac number, because 13131819 - 2⁵ = 13131787 is a prime.

It is a super-2 number, since 2×13131819² = 344889340497522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13131792 and 13131801.

It is not an unprimeable number, because it can be changed into a prime (13131319) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 729537 + ... + 729554.

It is an arithmetic number, because the mean of its divisors is an integer number (3161366).

Almost surely, 2^13131819 is an apocalyptic number.

13131819 is a deficient number, since it is larger than the sum of its proper divisors (5836377).

13131819 is a wasteful number, since it uses less digits than its factorization.

13131819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1459097 (or 1459094 counting only the distinct ones).

The product of its digits is 648, while the sum is 27.

The square root of 13131819 is about 3623.7851757520. The cubic root of 13131819 is about 235.9255426801.

The spelling of 13131819 in words is "thirteen million, one hundred thirty-one thousand, eight hundred nineteen".