131554543 has 2 divisors, whose sum is σ = 131554544. Its totient is φ = 131554542.

The previous prime is 131554519. The next prime is 131554547. The reversal of 131554543 is 345455131.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131554543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131554547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65777271 + 65777272.

It is an arithmetic number, because the mean of its divisors is an integer number (65777272).

Almost surely, 2^131554543 is an apocalyptic number.

131554543 is a deficient number, since it is larger than the sum of its proper divisors (1).

131554543 is an equidigital number, since it uses as much as digits as its factorization.

131554543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18000, while the sum is 31.

The square root of 131554543 is about 11469.7228824414. The cubic root of 131554543 is about 508.5909368775.

The spelling of 131554543 in words is "one hundred thirty-one million, five hundred fifty-four thousand, five hundred forty-three".