13135240631 has 4 divisors (see below), whose sum is σ = 13155113064. Its totient is φ = 13115368200.

The previous prime is 13135240577. The next prime is 13135240663. The reversal of 13135240631 is 13604253131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13135240631 - 2⁶ = 13135240567 is a prime.

It is a super-2 number, since 2×13135240631² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13135240594 and 13135240603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13135240681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9935225 + ... + 9936546.

It is an arithmetic number, because the mean of its divisors is an integer number (3288778266).

Almost surely, 2^13135240631 is an apocalyptic number.

13135240631 is a deficient number, since it is larger than the sum of its proper divisors (19872433).

13135240631 is an equidigital number, since it uses as much as digits as its factorization.

13135240631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19872432.

The product of its (nonzero) digits is 6480, while the sum is 29.

Adding to 13135240631 its reverse (13604253131), we get a palindrome (26739493762).

The spelling of 13135240631 in words is "thirteen billion, one hundred thirty-five million, two hundred forty thousand, six hundred thirty-one".