51432530451 has 4 divisors (see below), whose sum is σ = 68576707272. Its totient is φ = 34288353632.

The previous prime is 51432530449. The next prime is 51432530509. The reversal of 51432530451 is 15403523415.

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

It is a cyclic number.

It is not a de Polignac number, because 51432530451 - 2¹ = 51432530449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51432530441) 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, 8572088406 + ... + 8572088411.

It is an arithmetic number, because the mean of its divisors is an integer number (17144176818).

Almost surely, 2^51432530451 is an apocalyptic number.

51432530451 is a deficient number, since it is larger than the sum of its proper divisors (17144176821).

51432530451 is a wasteful number, since it uses less digits than its factorization.

51432530451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17144176820.

The product of its (nonzero) digits is 36000, while the sum is 33.

The spelling of 51432530451 in words is "fifty-one billion, four hundred thirty-two million, five hundred thirty thousand, four hundred fifty-one".