131045513 has 4 divisors (see below), whose sum is σ = 136743168. Its totient is φ = 125347860.

The previous prime is 131045477. The next prime is 131045531. The reversal of 131045513 is 315540131.

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, and also an emirpimes, since its reverse is a distinct semiprime: 315540131 = 149 ⋅2117719.

It is a cyclic number.

It is not a de Polignac number, because 131045513 - 2²² = 126851209 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 5697631 = 131045513 / (1 + 3 + 1 + 0 + 4 + 5 + 5 + 1 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131045543) 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, 2848793 + ... + 2848838.

It is an arithmetic number, because the mean of its divisors is an integer number (34185792).

Almost surely, 2^131045513 is an apocalyptic number.

It is an amenable number.

131045513 is a deficient number, since it is larger than the sum of its proper divisors (5697655).

131045513 is an equidigital number, since it uses as much as digits as its factorization.

131045513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5697654.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 131045513 is about 11447.5112142334. The cubic root of 131045513 is about 507.9341176160.

Adding to 131045513 its reverse (315540131), we get a palindrome (446585644).

The spelling of 131045513 in words is "one hundred thirty-one million, forty-five thousand, five hundred thirteen".