51543424453 has 4 divisors (see below), whose sum is σ = 51548464800. Its totient is φ = 51538384108.

The previous prime is 51543424421. The next prime is 51543424459. The reversal of 51543424453 is 35442434515.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51543424453 - 2⁵ = 51543424421 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51543424459) 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, 2504803 + ... + 2525296.

It is an arithmetic number, because the mean of its divisors is an integer number (12887116200).

Almost surely, 2^51543424453 is an apocalyptic number.

It is an amenable number.

51543424453 is a deficient number, since it is larger than the sum of its proper divisors (5040347).

51543424453 is a wasteful number, since it uses less digits than its factorization.

51543424453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5040346.

The product of its digits is 576000, while the sum is 40.

Adding to 51543424453 its reverse (35442434515), we get a palindrome (86985858968).

The spelling of 51543424453 in words is "fifty-one billion, five hundred forty-three million, four hundred twenty-four thousand, four hundred fifty-three".