13140631 has 4 divisors (see below), whose sum is σ = 15017872. Its totient is φ = 11263392.

The previous prime is 13140607. The next prime is 13140649. The reversal of 13140631 is 13604131.

13140631 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13604131 = 17 ⋅800243.

It is not a de Polignac number, because 13140631 - 2⁵ = 13140599 is a prime.

It is a super-2 number, since 2×13140631² = 345352366156322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13140599 and 13140608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13140331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 938610 + ... + 938623.

It is an arithmetic number, because the mean of its divisors is an integer number (3754468).

Almost surely, 2^13140631 is an apocalyptic number.

13140631 is a deficient number, since it is larger than the sum of its proper divisors (1877241).

13140631 is an equidigital number, since it uses as much as digits as its factorization.

13140631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1877240.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 13140631 is about 3625.0008275861. Note that the first 3 decimals coincide. The cubic root of 13140631 is about 235.9783028506.

Adding to 13140631 its reverse (13604131), we get a palindrome (26744762).

The spelling of 13140631 in words is "thirteen million, one hundred forty thousand, six hundred thirty-one".