202431344242 has 4 divisors (see below), whose sum is σ = 303647016366. Its totient is φ = 101215672120.

The previous prime is 202431344237. The next prime is 202431344243. The reversal of 202431344242 is 242443134202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 159200202001 + 43231142241 = 398999^2 + 207921^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (202431344243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50607836059 + ... + 50607836062.

Almost surely, 2^202431344242 is an apocalyptic number.

202431344242 is a deficient number, since it is larger than the sum of its proper divisors (101215672124).

202431344242 is a wasteful number, since it uses less digits than its factorization.

202431344242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101215672123.

The product of its (nonzero) digits is 36864, while the sum is 31.

Adding to 202431344242 its reverse (242443134202), we get a palindrome (444874478444).

The spelling of 202431344242 in words is "two hundred two billion, four hundred thirty-one million, three hundred forty-four thousand, two hundred forty-two".