1165513543 has 2 divisors, whose sum is σ = 1165513544. Its totient is φ = 1165513542.

The previous prime is 1165513537. The next prime is 1165513597. The reversal of 1165513543 is 3453155611.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1165513543 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1165513499 and 1165513508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1165513343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 582756771 + 582756772.

It is an arithmetic number, because the mean of its divisors is an integer number (582756772).

Almost surely, 2^1165513543 is an apocalyptic number.

1165513543 is a deficient number, since it is larger than the sum of its proper divisors (1).

1165513543 is an equidigital number, since it uses as much as digits as its factorization.

1165513543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27000, while the sum is 34.

The square root of 1165513543 is about 34139.6183780663. The cubic root of 1165513543 is about 1052.3796498607.

The spelling of 1165513543 in words is "one billion, one hundred sixty-five million, five hundred thirteen thousand, five hundred forty-three".