231335513 has 8 divisors (see below), whose sum is σ = 236520648. Its totient is φ = 226180864.

The previous prime is 231335491. The next prime is 231335527. The reversal of 231335513 is 315533132.

It can be written as a sum of positive squares in 4 ways, for example, as 172843609 + 58491904 = 13147^2 + 7648^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 231335513 - 2¹⁰ = 231334489 is a prime.

It is a super-2 number, since 2×231335513² = 107032239149946338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231335543) 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, 8081 + ... + 22977.

It is an arithmetic number, because the mean of its divisors is an integer number (29565081).

Almost surely, 2^231335513 is an apocalyptic number.

It is an amenable number.

231335513 is a deficient number, since it is larger than the sum of its proper divisors (5185135).

231335513 is a wasteful number, since it uses less digits than its factorization.

231335513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15243.

The product of its digits is 4050, while the sum is 26.

The square root of 231335513 is about 15209.7177159867. The cubic root of 231335513 is about 613.8761620400.

Adding to 231335513 its reverse (315533132), we get a palindrome (546868645).

The spelling of 231335513 in words is "two hundred thirty-one million, three hundred thirty-five thousand, five hundred thirteen".