13140831 has 8 divisors (see below), whose sum is σ = 19113984. Its totient is φ = 7964120.

The previous prime is 13140821. The next prime is 13140833. The reversal of 13140831 is 13804131.

13140831 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 13140831 - 2¹⁵ = 13108063 is a prime.

It is a super-2 number, since 2×13140831² = 345362878741122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13140798 and 13140807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13140833) 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, 199071 + ... + 199136.

It is an arithmetic number, because the mean of its divisors is an integer number (2389248).

Almost surely, 2^13140831 is an apocalyptic number.

13140831 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13140831 is a deficient number, since it is larger than the sum of its proper divisors (5973153).

13140831 is a wasteful number, since it uses less digits than its factorization.

13140831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398221.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 13140831 is about 3625.0284136817. The cubic root of 13140831 is about 235.9795000387.

Adding to 13140831 its reverse (13804131), we get a palindrome (26944962).

The spelling of 13140831 in words is "thirteen million, one hundred forty thousand, eight hundred thirty-one".