56543 has 2 divisors, whose sum is σ = 56544. Its totient is φ = 56542.

The previous prime is 56533. The next prime is 56569. The reversal of 56543 is 34565.

56543 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56543 - 2⁴ = 56527 is a prime.

It is a super-2 number, since 2×56543² = 6394221698, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28271 + 28272.

It is an arithmetic number, because the mean of its divisors is an integer number (28272).

2⁵⁶⁵⁴³ is an apocalyptic number.

56543 is a deficient number, since it is larger than the sum of its proper divisors (1).

56543 is an equidigital number, since it uses as much as digits as its factorization.

56543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1800, while the sum is 23.

The square root of 56543 is about 237.7877204567. The cubic root of 56543 is about 38.3818834536.

The spelling of 56543 in words is "fifty-six thousand, five hundred forty-three".