131005143 has 12 divisors (see below), whose sum is σ = 191822800. Its totient is φ = 86139936.

The previous prime is 131005117. The next prime is 131005157. The reversal of 131005143 is 341500131.

It is not a de Polignac number, because 131005143 - 2¹² = 131001047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131005543) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 99043 + ... + 100356.

Almost surely, 2^131005143 is an apocalyptic number.

131005143 is a deficient number, since it is larger than the sum of its proper divisors (60817657).

131005143 is a wasteful number, since it uses less digits than its factorization.

131005143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199478 (or 199475 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 131005143 is about 11445.7478130527. The cubic root of 131005143 is about 507.8819540436.

Adding to 131005143 its reverse (341500131), we get a palindrome (472505274).

The spelling of 131005143 in words is "one hundred thirty-one million, five thousand, one hundred forty-three".