131405143 has 2 divisors, whose sum is σ = 131405144. Its totient is φ = 131405142.

The previous prime is 131405137. The next prime is 131405171. The reversal of 131405143 is 341504131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 131405143 - 2⁵ = 131405111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131405173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65702571 + 65702572.

It is an arithmetic number, because the mean of its divisors is an integer number (65702572).

Almost surely, 2^131405143 is an apocalyptic number.

131405143 is a deficient number, since it is larger than the sum of its proper divisors (1).

131405143 is an equidigital number, since it uses as much as digits as its factorization.

131405143 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 131405143 is about 11463.2082333001. The cubic root of 131405143 is about 508.3983367439.

Adding to 131405143 its reverse (341504131), we get a palindrome (472909274).

The spelling of 131405143 in words is "one hundred thirty-one million, four hundred five thousand, one hundred forty-three".