13812831 has 12 divisors (see below), whose sum is σ = 19990152. Its totient is φ = 9190896.

The previous prime is 13812809. The next prime is 13812833. The reversal of 13812831 is 13821831.

13812831 is a `hidden beast` number, since 1 + 381 + 283 + 1 = 666.

It is not a de Polignac number, because 13812831 - 2⁶ = 13812767 is a prime.

It is a super-2 number, since 2×13812831² = 381588600469122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13812795 and 13812804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13812833) 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 11 ways as a sum of consecutive naturals, for example, 4960 + ... + 7226.

It is an arithmetic number, because the mean of its divisors is an integer number (1665846).

Almost surely, 2^13812831 is an apocalyptic number.

13812831 is a deficient number, since it is larger than the sum of its proper divisors (6177321).

13812831 is a wasteful number, since it uses less digits than its factorization.

13812831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2950 (or 2947 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 13812831 is about 3716.5617175018. The cubic root of 13812831 is about 239.9353471683.

The spelling of 13812831 in words is "thirteen million, eight hundred twelve thousand, eight hundred thirty-one".