81527 has 2 divisors, whose sum is σ = 81528. Its totient is φ = 81526.

The previous prime is 81517. The next prime is 81533. The reversal of 81527 is 72518.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 81527 - 2⁶ = 81463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40763 + 40764.

It is an arithmetic number, because the mean of its divisors is an integer number (40764).

2⁸¹⁵²⁷ is an apocalyptic number.

81527 is a deficient number, since it is larger than the sum of its proper divisors (1).

81527 is an equidigital number, since it uses as much as digits as its factorization.

81527 is an evil number, because the sum of its binary digits is even.

The product of its digits is 560, while the sum is 23.

The square root of 81527 is about 285.5293329940. The cubic root of 81527 is about 43.3611195887.

Subtracting from 81527 its reverse (72518), we obtain a palindrome (9009).

The spelling of 81527 in words is "eighty-one thousand, five hundred twenty-seven".