231465613 has 4 divisors (see below), whose sum is σ = 231496380. Its totient is φ = 231434848.

The previous prime is 231465607. The next prime is 231465631. The reversal of 231465613 is 316564132.

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 55160329 + 176305284 = 7427^2 + 13278^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231465613 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 (231465683) 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, 4281 + ... + 21937.

It is an arithmetic number, because the mean of its divisors is an integer number (57874095).

Almost surely, 2^231465613 is an apocalyptic number.

It is an amenable number.

231465613 is a deficient number, since it is larger than the sum of its proper divisors (30767).

231465613 is a wasteful number, since it uses less digits than its factorization.

231465613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30766.

The product of its digits is 12960, while the sum is 31.

The square root of 231465613 is about 15213.9939858014. The cubic root of 231465613 is about 613.9912190562.

The spelling of 231465613 in words is "two hundred thirty-one million, four hundred sixty-five thousand, six hundred thirteen".