131445539 has 8 divisors (see below), whose sum is σ = 134816880. Its totient is φ = 128088576.

The previous prime is 131445473. The next prime is 131445563. The reversal of 131445539 is 935544131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131445539 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131445499 and 131445508.

It is not an unprimeable number, because it can be changed into a prime (131445599) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16307 + ... + 22995.

It is an arithmetic number, because the mean of its divisors is an integer number (16852110).

Almost surely, 2^131445539 is an apocalyptic number.

131445539 is a deficient number, since it is larger than the sum of its proper divisors (3371341).

131445539 is an equidigital number, since it uses as much as digits as its factorization.

131445539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7189.

The product of its digits is 32400, while the sum is 35.

The square root of 131445539 is about 11464.9700828218. The cubic root of 131445539 is about 508.4504279447.

The spelling of 131445539 in words is "one hundred thirty-one million, four hundred forty-five thousand, five hundred thirty-nine".