613231 has 2 divisors, whose sum is σ = 613232. Its totient is φ = 613230.

The previous prime is 613229. The next prime is 613243. The reversal of 613231 is 132316.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 613231 - 2¹ = 613229 is a prime.

It is a super-2 number, since 2×613231² = 752104518722, which contains 22 as substring.

Together with 613229, it forms a pair of twin primes.

613231 is a lucky number.

It is a plaindrome in base 8.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (617231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306615 + 306616.

It is an arithmetic number, because the mean of its divisors is an integer number (306616).

2⁶¹³²³¹ is an apocalyptic number.

613231 is a deficient number, since it is larger than the sum of its proper divisors (1).

613231 is an equidigital number, since it uses as much as digits as its factorization.

613231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108, while the sum is 16.

The square root of 613231 is about 783.0906716339. The cubic root of 613231 is about 84.9587342949.

Adding to 613231 its reverse (132316), we get a palindrome (745547).

The spelling of 613231 in words is "six hundred thirteen thousand, two hundred thirty-one".