231241613 has 4 divisors (see below), whose sum is σ = 231272028. Its totient is φ = 231211200.

The previous prime is 231241603. The next prime is 231241627. The reversal of 231241613 is 316142132.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 7828804 + 223412809 = 2798^2 + 14947^2 .

It is a cyclic number.

It is not a de Polignac number, because 231241613 - 2⁸ = 231241357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231241603) 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, 7445 + ... + 22757.

It is an arithmetic number, because the mean of its divisors is an integer number (57818007).

Almost surely, 2^231241613 is an apocalyptic number.

It is an amenable number.

231241613 is a deficient number, since it is larger than the sum of its proper divisors (30415).

231241613 is a wasteful number, since it uses less digits than its factorization.

231241613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30414.

The product of its digits is 864, while the sum is 23.

The square root of 231241613 is about 15206.6305603838. The cubic root of 231241613 is about 613.7930925452.

Adding to 231241613 its reverse (316142132), we get a palindrome (547383745).

It can be divided in two parts, 2312 and 41613, that multiplied together give a triangular number (96209256 = T₁₃₈₇₁).

The spelling of 231241613 in words is "two hundred thirty-one million, two hundred forty-one thousand, six hundred thirteen".