541131542509 has 2 divisors, whose sum is σ = 541131542510. Its totient is φ = 541131542508.

The previous prime is 541131542489. The next prime is 541131542639. The reversal of 541131542509 is 905245131145.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 446711773225 + 94419769284 = 668365^2 + 307278^2 .

It is a cyclic number.

It is not a de Polignac number, because 541131542509 - 2⁵ = 541131542477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (541131542909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 270565771254 + 270565771255.

It is an arithmetic number, because the mean of its divisors is an integer number (270565771255).

Almost surely, 2^541131542509 is an apocalyptic number.

It is an amenable number.

541131542509 is a deficient number, since it is larger than the sum of its proper divisors (1).

541131542509 is an equidigital number, since it uses as much as digits as its factorization.

541131542509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108000, while the sum is 40.

The spelling of 541131542509 in words is "five hundred forty-one billion, one hundred thirty-one million, five hundred forty-two thousand, five hundred nine".