13103111540 has 12 divisors (see below), whose sum is σ = 27516534276. Its totient is φ = 5241244608.

The previous prime is 13103111533. The next prime is 13103111603. The reversal of 13103111540 is 4511130131.

It can be written as a sum of positive squares in 2 ways, for example, as 10474703716 + 2628407824 = 102346^2 + 51268^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 655155577 = 13103111540 / (1 + 3 + 1 + 0 + 3 + 1 + 1 + 1 + 5 + 4 + 0).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 327577769 + ... + 327577808.

It is an arithmetic number, because the mean of its divisors is an integer number (2293044523).

Almost surely, 2^13103111540 is an apocalyptic number.

13103111540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13103111540 is an abundant number, since it is smaller than the sum of its proper divisors (14413422736).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13103111540 is a wasteful number, since it uses less digits than its factorization.

13103111540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655155586 (or 655155584 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 20.

Adding to 13103111540 its reverse (4511130131), we get a palindrome (17614241671).

The spelling of 13103111540 in words is "thirteen billion, one hundred three million, one hundred eleven thousand, five hundred forty".