231243413 has 4 divisors (see below), whose sum is σ = 232236108. Its totient is φ = 230250720.

The previous prime is 231243409. The next prime is 231243421. The reversal of 231243413 is 314342132.

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 76440049 + 154803364 = 8743^2 + 12442^2 .

It is a cyclic number.

It is not a de Polignac number, because 231243413 - 2² = 231243409 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 (231243443) 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, 495998 + ... + 496463.

It is an arithmetic number, because the mean of its divisors is an integer number (58059027).

Almost surely, 2^231243413 is an apocalyptic number.

It is an amenable number.

231243413 is a deficient number, since it is larger than the sum of its proper divisors (992695).

231243413 is an equidigital number, since it uses as much as digits as its factorization.

231243413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 992694.

The product of its digits is 1728, while the sum is 23.

The square root of 231243413 is about 15206.6897449774. The cubic root of 231243413 is about 613.7946851431.

Adding to 231243413 its reverse (314342132), we get a palindrome (545585545).

The spelling of 231243413 in words is "two hundred thirty-one million, two hundred forty-three thousand, four hundred thirteen".