231006613 has 4 divisors (see below), whose sum is σ = 231177708. Its totient is φ = 230835520.

The previous prime is 231006583. The next prime is 231006623. The reversal of 231006613 is 316600132.

231006613 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 can be written as a sum of positive squares in 2 ways, for example, as 23444964 + 207561649 = 4842^2 + 14407^2 .

It is a cyclic number.

It is not a de Polignac number, because 231006613 - 2⁹ = 231006101 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 (231006623) 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, 83506 + ... + 86227.

It is an arithmetic number, because the mean of its divisors is an integer number (57794427).

Almost surely, 2^231006613 is an apocalyptic number.

It is an amenable number.

231006613 is a deficient number, since it is larger than the sum of its proper divisors (171095).

231006613 is a wasteful number, since it uses less digits than its factorization.

231006613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171094.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 231006613 is about 15198.9017037416. The cubic root of 231006613 is about 613.5850990323.

Adding to 231006613 its reverse (316600132), we get a palindrome (547606745).

The spelling of 231006613 in words is "two hundred thirty-one million, six thousand, six hundred thirteen".