203151231240242 has 4 divisors (see below), whose sum is σ = 304726846860366. Its totient is φ = 101575615620120.

The previous prime is 203151231240241. The next prime is 203151231240257. The reversal of 203151231240242 is 242042132151302.

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., 107994308304961 + 95156922935281 = 10392031^2 + 9754841^2 .

It is a junction number, because it is equal to n+sod(n) for n = 203151231240199 and 203151231240208.

It is not an unprimeable number, because it can be changed into a prime (203151231240241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50787807810059 + ... + 50787807810062.

Almost surely, 2^{203151231240242} is an apocalyptic number.

203151231240242 is a deficient number, since it is larger than the sum of its proper divisors (101575615620124).

203151231240242 is a wasteful number, since it uses less digits than its factorization.

203151231240242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101575615620123.

The product of its (nonzero) digits is 23040, while the sum is 32.

Adding to 203151231240242 its reverse (242042132151302), we get a palindrome (445193363391544).

The spelling of 203151231240242 in words is "two hundred three trillion, one hundred fifty-one billion, two hundred thirty-one million, two hundred forty thousand, two hundred forty-two".