451221422842 has 8 divisors (see below), whose sum is σ = 677442446100. Its totient is φ = 225407274144.

The previous prime is 451221422833. The next prime is 451221422843. The reversal of 451221422842 is 248224122154.

It can be written as a sum of positive squares in 2 ways, for example, as 402997702041 + 48223720801 = 634821^2 + 219599^2 .

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

It is not an unprimeable number, because it can be changed into a prime (451221422843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101715867 + ... + 101720302.

Almost surely, 2^451221422842 is an apocalyptic number.

451221422842 is a deficient number, since it is larger than the sum of its proper divisors (226221023258).

451221422842 is a wasteful number, since it uses less digits than its factorization.

451221422842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203437280.

The product of its digits is 81920, while the sum is 37.

Adding to 451221422842 its reverse (248224122154), we get a palindrome (699445544996).

The spelling of 451221422842 in words is "four hundred fifty-one billion, two hundred twenty-one million, four hundred twenty-two thousand, eight hundred forty-two".