231813842 has 8 divisors (see below), whose sum is σ = 374468556. Its totient is φ = 106990992.

The previous prime is 231813833. The next prime is 231813859. The reversal of 231813842 is 248318132.

231813842 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 217533001 + 14280841 = 14749^2 + 3779^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 231813799 and 231813808.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4457933 + ... + 4457984.

Almost surely, 2^231813842 is an apocalyptic number.

231813842 is a deficient number, since it is larger than the sum of its proper divisors (142654714).

231813842 is a wasteful number, since it uses less digits than its factorization.

231813842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8915932.

The product of its digits is 9216, while the sum is 32.

The square root of 231813842 is about 15225.4340496421. The cubic root of 231813842 is about 614.2989716318.

The spelling of 231813842 in words is "two hundred thirty-one million, eight hundred thirteen thousand, eight hundred forty-two".