131245513 has 4 divisors (see below), whose sum is σ = 149994880. Its totient is φ = 112496148.

The previous prime is 131245501. The next prime is 131245519. The reversal of 131245513 is 315542131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 131245513 - 2¹³ = 131237321 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131245519) 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, 9374673 + ... + 9374686.

It is an arithmetic number, because the mean of its divisors is an integer number (37498720).

Almost surely, 2^131245513 is an apocalyptic number.

It is an amenable number.

131245513 is a deficient number, since it is larger than the sum of its proper divisors (18749367).

131245513 is an equidigital number, since it uses as much as digits as its factorization.

131245513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18749366.

The product of its digits is 1800, while the sum is 25.

The square root of 131245513 is about 11456.2434069812. The cubic root of 131245513 is about 508.1923871409.

Adding to 131245513 its reverse (315542131), we get a palindrome (446787644).

The spelling of 131245513 in words is "one hundred thirty-one million, two hundred forty-five thousand, five hundred thirteen".