4551421402243 has 4 divisors (see below), whose sum is σ = 4551443137800. Its totient is φ = 4551399666688.

The previous prime is 4551421402237. The next prime is 4551421402261. The reversal of 4551421402243 is 3422041241554.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4551421402243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4551421402343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10550593 + ... + 10973506.

It is an arithmetic number, because the mean of its divisors is an integer number (1137860784450).

Almost surely, 2^{4551421402243} is an apocalyptic number.

4551421402243 is a deficient number, since it is larger than the sum of its proper divisors (21735557).

4551421402243 is a wasteful number, since it uses less digits than its factorization.

4551421402243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21735556.

The product of its (nonzero) digits is 153600, while the sum is 37.

Adding to 4551421402243 its reverse (3422041241554), we get a palindrome (7973462643797).

The spelling of 4551421402243 in words is "four trillion, five hundred fifty-one billion, four hundred twenty-one million, four hundred two thousand, two hundred forty-three".