131103513 has 6 divisors (see below), whose sum is σ = 189371754. Its totient is φ = 87402336.

The previous prime is 131103509. The next prime is 131103571. The reversal of 131103513 is 315301131.

131103513 is a `hidden beast` number, since 1 + 311 + 0 + 351 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 116380944 + 14722569 = 10788^2 + 3837^2 .

It is not a de Polignac number, because 131103513 - 2² = 131103509 is a prime.

It is a super-2 number, since 2×131103513² = 34376262241882338, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (131103593) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7283520 + ... + 7283537.

It is an arithmetic number, because the mean of its divisors is an integer number (31561959).

Almost surely, 2^131103513 is an apocalyptic number.

It is an amenable number.

131103513 is a deficient number, since it is larger than the sum of its proper divisors (58268241).

131103513 is a wasteful number, since it uses less digits than its factorization.

131103513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14567063 (or 14567060 counting only the distinct ones).

The product of its (nonzero) digits is 135, while the sum is 18.

The square root of 131103513 is about 11450.0442357224. The cubic root of 131103513 is about 508.0090428154.

Adding to 131103513 its reverse (315301131), we get a palindrome (446404644).

The spelling of 131103513 in words is "one hundred thirty-one million, one hundred three thousand, five hundred thirteen".