31233221242 has 4 divisors (see below), whose sum is σ = 46849831866. Its totient is φ = 15616610620.

The previous prime is 31233221237. The next prime is 31233221251. The reversal of 31233221242 is 24212233213.

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., 31194271161 + 38950081 = 176619^2 + 6241^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7808305309 + ... + 7808305312.

Almost surely, 2^31233221242 is an apocalyptic number.

31233221242 is a deficient number, since it is larger than the sum of its proper divisors (15616610624).

31233221242 is a wasteful number, since it uses less digits than its factorization.

31233221242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15616610623.

The product of its digits is 3456, while the sum is 25.

Adding to 31233221242 its reverse (24212233213), we get a palindrome (55445454455).

The spelling of 31233221242 in words is "thirty-one billion, two hundred thirty-three million, two hundred twenty-one thousand, two hundred forty-two".