613311331 has 2 divisors, whose sum is σ = 613311332. Its totient is φ = 613311330.

The previous prime is 613311299. The next prime is 613311383. The reversal of 613311331 is 133113316.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 613311331 - 2⁵ = 613311299 is a prime.

It is a super-2 number, since 2×613311331² = 752301577465983122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (613311631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306655665 + 306655666.

It is an arithmetic number, because the mean of its divisors is an integer number (306655666).

Almost surely, 2^613311331 is an apocalyptic number.

613311331 is a deficient number, since it is larger than the sum of its proper divisors (1).

613311331 is an equidigital number, since it uses as much as digits as its factorization.

613311331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 486, while the sum is 22.

The square root of 613311331 is about 24765.1232785141. The cubic root of 613311331 is about 849.6244389321.

Adding to 613311331 its reverse (133113316), we get a palindrome (746424647).

The spelling of 613311331 in words is "six hundred thirteen million, three hundred eleven thousand, three hundred thirty-one".