13564543 has 2 divisors, whose sum is σ = 13564544. Its totient is φ = 13564542.

The previous prime is 13564519. The next prime is 13564553. The reversal of 13564543 is 34546531.

It is a strong prime.

It is an emirp because it is prime and its reverse (34546531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13564543 - 2¹⁷ = 13433471 is a prime.

It is equal to p₈₈₃₅₄₃ and since 13564543 and 883543 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13564553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6782271 + 6782272.

It is an arithmetic number, because the mean of its divisors is an integer number (6782272).

Almost surely, 2^13564543 is an apocalyptic number.

13564543 is a deficient number, since it is larger than the sum of its proper divisors (1).

13564543 is an equidigital number, since it uses as much as digits as its factorization.

13564543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21600, while the sum is 31.

The square root of 13564543 is about 3683.0073309729. The cubic root of 13564543 is about 238.4890199417.

It can be divided in two parts, 1 and 3564543, that added together give a square (3564544 = 1888²).

The spelling of 13564543 in words is "thirteen million, five hundred sixty-four thousand, five hundred forty-three".