68531 has 2 divisors, whose sum is σ = 68532. Its totient is φ = 68530.

The previous prime is 68521. The next prime is 68539. The reversal of 68531 is 13586.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68531 - 2¹⁴ = 52147 is a prime.

It is a super-2 number, since 2×68531² = 9392995922, which contains 22 as substring.

It is a Chen prime.

It is a plaindrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 68497 and 68506.

It is not a weakly prime, because it can be changed into another prime (68539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34265 + 34266.

It is an arithmetic number, because the mean of its divisors is an integer number (34266).

2⁶⁸⁵³¹ is an apocalyptic number.

68531 is a deficient number, since it is larger than the sum of its proper divisors (1).

68531 is an equidigital number, since it uses as much as digits as its factorization.

68531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 720, while the sum is 23.

The square root of 68531 is about 261.7842623230. The cubic root of 68531 is about 40.9225187495.

Subtracting from 68531 its reverse (13586), we obtain a palindrome (54945).

The spelling of 68531 in words is "sixty-eight thousand, five hundred thirty-one".