231412513 has 4 divisors (see below), whose sum is σ = 233703828. Its totient is φ = 229121200.

The previous prime is 231412507. The next prime is 231412583. The reversal of 231412513 is 315214132.

It is a happy number.

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 222845184 + 8567329 = 14928^2 + 2927^2 .

It is a cyclic number.

It is not a de Polignac number, because 231412513 - 2¹⁷ = 231281441 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231412583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1145506 + ... + 1145707.

It is an arithmetic number, because the mean of its divisors is an integer number (58425957).

Almost surely, 2^231412513 is an apocalyptic number.

It is an amenable number.

231412513 is a deficient number, since it is larger than the sum of its proper divisors (2291315).

231412513 is a wasteful number, since it uses less digits than its factorization.

231412513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2291314.

The product of its digits is 720, while the sum is 22.

The square root of 231412513 is about 15212.2487818205. The cubic root of 231412513 is about 613.9442640223.

Adding to 231412513 its reverse (315214132), we get a palindrome (546626645).

The spelling of 231412513 in words is "two hundred thirty-one million, four hundred twelve thousand, five hundred thirteen".