131540047 has 2 divisors, whose sum is σ = 131540048. Its totient is φ = 131540046.

The previous prime is 131540041. The next prime is 131540063. The reversal of 131540047 is 740045131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 131540047 - 2³ = 131540039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131540041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65770023 + 65770024.

It is an arithmetic number, because the mean of its divisors is an integer number (65770024).

Almost surely, 2^131540047 is an apocalyptic number.

131540047 is a deficient number, since it is larger than the sum of its proper divisors (1).

131540047 is an equidigital number, since it uses as much as digits as its factorization.

131540047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 131540047 is about 11469.0909404364. The cubic root of 131540047 is about 508.5722556399.

Adding to 131540047 its reverse (740045131), we get a palindrome (871585178).

The spelling of 131540047 in words is "one hundred thirty-one million, five hundred forty thousand, forty-seven".