71563 has 2 divisors, whose sum is σ = 71564. Its totient is φ = 71562.

The previous prime is 71551. The next prime is 71569. The reversal of 71563 is 36517.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71563 is a prime.

It is a plaindrome in base 16.

It is not a weakly prime, because it can be changed into another prime (71569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35781 + 35782.

It is an arithmetic number, because the mean of its divisors is an integer number (35782).

2⁷¹⁵⁶³ is an apocalyptic number.

71563 is a deficient number, since it is larger than the sum of its proper divisors (1).

71563 is an equidigital number, since it uses as much as digits as its factorization.

71563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 630, while the sum is 22.

The square root of 71563 is about 267.5126165249. The cubic root of 71563 is about 41.5173392488.

The spelling of 71563 in words is "seventy-one thousand, five hundred sixty-three".