613131 has 4 divisors (see below), whose sum is σ = 817512. Its totient is φ = 408752.

The previous prime is 613099. The next prime is 613141. The reversal of 613131 is 131316.

613131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 613131 - 2⁵ = 613099 is a prime.

It is a super-2 number, since 2×613131² = 751859246322, which contains 22 as substring.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 613131.

It is not an unprimeable number, because it can be changed into a prime (613141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102186 + ... + 102191.

It is an arithmetic number, because the mean of its divisors is an integer number (204378).

2⁶¹³¹³¹ is an apocalyptic number.

613131 is a deficient number, since it is larger than the sum of its proper divisors (204381).

613131 is a wasteful number, since it uses less digits than its factorization.

613131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204380.

The product of its digits is 54, while the sum is 15.

The square root of 613131 is about 783.0268194641. The cubic root of 613131 is about 84.9541159508.

Adding to 613131 its reverse (131316), we get a palindrome (744447).

The spelling of 613131 in words is "six hundred thirteen thousand, one hundred thirty-one".