231243412420402 has 16 divisors (see below), whose sum is σ = 346926232791000. Its totient is φ = 115601335759360.

The previous prime is 231243412420399. The next prime is 231243412420403. The reversal of 231243412420402 is 204024214342132.

It can be written as a sum of positive squares in 4 ways, for example, as 205639012934161 + 25604399486241 = 14340119^2 + 5060079^2 .

It is not an unprimeable number, because it can be changed into a prime (231243412420403) 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, 550174224 + ... + 550594372.

Almost surely, 2^{231243412420402} is an apocalyptic number.

231243412420402 is a deficient number, since it is larger than the sum of its proper divisors (115682820370598).

231243412420402 is a wasteful number, since it uses less digits than its factorization.

231243412420402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467981.

The product of its (nonzero) digits is 73728, while the sum is 34.

Adding to 231243412420402 its reverse (204024214342132), we get a palindrome (435267626762534).

The spelling of 231243412420402 in words is "two hundred thirty-one trillion, two hundred forty-three billion, four hundred twelve million, four hundred twenty thousand, four hundred two".