231020242 has 12 divisors (see below), whose sum is σ = 368114490. Its totient is φ = 108715136.

The previous prime is 231020233. The next prime is 231020243. The reversal of 231020242 is 242020132.

231020242 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 3 ways, for example, as 214300321 + 16719921 = 14639^2 + 4089^2 .

It is not an unprimeable number, because it can be changed into a prime (231020243) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 199267 + ... + 200422.

Almost surely, 2^231020242 is an apocalyptic number.

231020242 is a deficient number, since it is larger than the sum of its proper divisors (137094248).

231020242 is a wasteful number, since it uses less digits than its factorization.

231020242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399725 (or 399708 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 231020242 is about 15199.3500518937. The cubic root of 231020242 is about 613.5971656232.

Adding to 231020242 its reverse (242020132), we get a palindrome (473040374).

The spelling of 231020242 in words is "two hundred thirty-one million, twenty thousand, two hundred forty-two".