168231613 has 8 divisors (see below), whose sum is σ = 183924000. Its totient is φ = 152605680.

The previous prime is 168231607. The next prime is 168231631. The reversal of 168231613 is 316132861.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-168231613 is a prime.

It is a super-2 number, since 2×168231613² = 56603751225163538, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168231673) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11238 + ... + 21511.

It is an arithmetic number, because the mean of its divisors is an integer number (22990500).

Almost surely, 2^168231613 is an apocalyptic number.

It is an amenable number.

168231613 is a deficient number, since it is larger than the sum of its proper divisors (15692387).

168231613 is a wasteful number, since it uses less digits than its factorization.

168231613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33227.

The product of its digits is 5184, while the sum is 31.

The square root of 168231613 is about 12970.4129849438. The cubic root of 168231613 is about 552.0382913383.

The spelling of 168231613 in words is "one hundred sixty-eight million, two hundred thirty-one thousand, six hundred thirteen".